Term
| when a parallel bank exists in a series path, both resistors have the same voltage across them. |
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Definition
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Term
| in a series parallel circuit, any individual series R has its own IR drop that must be less than the total Vt. |
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Definition
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Term
| a wheatstone bridge cannot accurately determine the value of an unknown resistor. |
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Definition
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Term
| with a negative temperature coefficient NTC thermistor, as temperature goes up, resistance goes up |
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Definition
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Term
| a short within a series parallel circuit does not necessarily mean that the circuit will definitely draw excessive current from the voltage source. |
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Definition
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Term
| when series resistors are connected in parallel, the series resistors form a |
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Definition
| bank or strings in parallel |
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Term
| the sum of the branch currents for all parallel strings equals the current. |
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Definition
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Term
| a very sensitive zero centered current meter is called a |
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Definition
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Term
| a variety of sensors are used in circuits for detecting changes in pressure, flow, light, etc. |
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Definition
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Term
| how many parallel strings can there be in a series parallel circuit? |
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Definition
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Term
| when a parallel bank exists in a series path, both resistors have the same |
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Definition
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Term
| a variety of sensors are used in bridge circuits for detecting changes in |
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Definition
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Term
| any parallel circuit is a current divider in which the individual branch currents are inversely proportional to the branch resistance values. |
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Definition
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Term
| two main characeteristics of a resistor are its resistance in ohms and its power in watts |
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Definition
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Term
| the amount by which the actual resistance can differ from the color coded value is the tolreance |
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Definition
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Term
| zero ohm resistors are not commonly found on printed circuit boards |
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Definition
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Term
| a potentiomenter can be wired as a rheostat. |
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Definition
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Term
| the most common trouble in resistors is a short |
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Definition
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Term
| a resistor whose resistance value changes with changes in operating temperature |
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Definition
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Term
| the amount by which the actual resistance can differ from the color coded value is the |
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Definition
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Term
| a resistor with a single black band around the center of the resistor body has a resistance of |
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Definition
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Term
| Ohm's law states that the amount of current is inversely proportional to the voltage and directly proportional to the resistance |
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Definition
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Term
| a graph referred to as the volt ampere characteristic of R shows how much current the resistor allows for different voltages. |
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Definition
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Term
| a straight line graph shows that a resistor is linear. |
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Definition
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Term
| The unit of electric power is the watt |
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Definition
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Term
| power is equal to voltage divided by current |
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Definition
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Term
| a straight line graph shows that a resistor is |
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Definition
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Term
| when the applied voltage is constant, the current is more with resistance. |
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Definition
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Term
| the rate of doing work is |
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Definition
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Term
| an example of a nonlinear resistance is the |
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Definition
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Term
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Definition
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Term
| What is produced when current flows in a resistance? |
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Definition
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Term
| How much current is needed for a 600 Watt, 120 volt toaster |
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Definition
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Term
| Since there is only one path for electrons to follow, the current must be the same in all parts of a series current |
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Definition
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Term
| kirchoff's voltage law states that the sum of all resistor voltage drops in a series circuit equals the applied voltage |
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Definition
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Term
| a common application of series circuits is to use a resistance to decrease the voltage from the source Vt to a lower value |
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Definition
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Term
| in most electrical and electronic systems, one side of the voltage source is connected to ground |
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Definition
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Term
| To diagnose or to analyze electronic equipment, are other names for.... |
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Definition
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Term
| a break in the current path of a series circuit is called a ... |
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Definition
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Term
| a circuit that provides only one path for current flow is a |
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Definition
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Term
| a combination of series resistances is often called a ... |
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Definition
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Term
| components that are in the same current path are called... |
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Definition
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Term
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Definition
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Term
| the total power used in a series circuit is the |
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Definition
| b. sum of the individual values of power dissipated in each part of the circuit |
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Term
| a parallel circuit is formed when one or more components are connected across a voltage source |
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Definition
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Term
| in a parallel circuit, the branch with the highest resistance always has the least current |
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Definition
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Term
| adding parallel resistance decreases the total resistance |
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Definition
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Term
| the recipirocal resistance formula is derived from the fact that total current is equal to the current of any one branch |
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Definition
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Term
| the current in an open branch of a parallel circuit is |
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Definition
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Term
| a device which serves to protect the circuit components and wiring in the event of a short circuit is a ... |
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Definition
| circuit breaker or a fuse |
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Term
| the base unit of .....is the siemens |
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Definition
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Term
| wih power removed from a ......parallel circuit, an ohmeter will measure zero ohms across all the branches |
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Definition
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Term
| the combined equivalent resistance of two unequal resistances connected in parallel can by found by |
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Definition
| b. the product divided by sum method |
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Term
| in a parallel circuit, total power equals |
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Definition
| a. the sum of individual values of power in each branch. |
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Term
| with power removed from a shorted parallel circuit, an ohmeter will measure what across all branches |
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Definition
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Term
| any circuit that provides one common voltage across all components is a |
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Definition
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Term
| putting more resistance into a parallel circuit |
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Definition
| a. lowers the equivalent resistance |
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Term
| any parallel circuit is a current divider in which the individual branch currents are inversely proportional to the branch resistance values |
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Definition
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Term
| in a two branch, parallel circuit, once one current is calculated, the other can be found by subtracting the calculated current from the total. |
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Definition
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Term
| with parallel branches, a higher resistance takes more branch current |
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Definition
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Term
| conductance and current are directly proportional |
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Definition
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Term
| the unit for G is the watt - second |
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Definition
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Term
| all .... in a voltage divider must come from the voltage source |
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Definition
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Term
| the bleeder current that flows through an entire divider is generally specified at about....percent of the load. |
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Definition
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Term
| a loaded voltage divider is just a practical application of a ..... circuit |
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Definition
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Term
| in a series voltage divide, the points at which different voltages are available are called |
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Definition
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Term
| any series circuit in which the individual resistor voltage drops are proportional to the series resistance values is a |
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Definition
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Term
| conductance G is equal to |
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Definition
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Term
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Definition
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Term
| the current divider formula can be used |
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Definition
| c. only for two branch resistances |
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Term
| the smaller the diameter of a wire, the less current it can carry |
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Definition
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Term
| an insulator is any material that resists or prevents the flow of electric charge, such as electrons |
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Definition
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Term
| examples of conductors include air, paper, plastics, rubber, mica, and glass, to name a few |
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Definition
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Term
| most wire conductors are copper |
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Definition
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Term
| continuity of wires and printed wiring can be tested by using an |
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Definition
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Term
| the advantage of a circit.......is that it can be reset once the bimetallic strip cools down and the short circuit has been removed |
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Definition
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Term
| the ......of a wire conductor is inversely proportional to its cross sectional area |
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Definition
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Term
| liquids that are good conductors because of.......are called electrolytes |
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Definition
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Term
| what is the result of breakdown in the insulator because of a high potential difference that ruptures the dielectric? |
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Definition
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Term
| what prevents a wire conductor from coming into contact with any nearby conductor |
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Definition
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Term
| which of the following cable connectors is universally usied in cable television? |
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Definition
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Term
| a device constructed of a thin bimetallic strip that expands with heat and in turn opens the circuit is called |
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Definition
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Term
| a lead sulfuric acid cell is the type used in most automobiles |
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Definition
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Term
| an internal resistance of less than one ohm is considered good for a voltage source cell |
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Definition
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Term
| mercuiry cells are easy to obtain despite hazards associated with proper dispoasal after use |
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Definition
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Term
| the lead acid cell can be rechargeds |
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Definition
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Term
| a common rating used with lead acid batters is |
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Definition
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Term
| a method in which a charger and a battery are always connected to each other to supply current to the load is referred to as ......charging |
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Definition
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Term
| a device for converting chemical energy into electrical energy is a |
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Definition
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Term
| specific gravity is a ratio comparing the weight of a substance with the weight of..... |
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Definition
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Term
| what type cell is an electrochemical device that converts hydrogen and oxygen into water and in the process produces eletriciy |
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Definition
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Term
| the carbon zinc cell is very common beecause of its |
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Definition
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Term
| what cell has an output of 1.5 v and is available as either a primary or secondary cell and lasts much longer than a carbon zinc cell |
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Definition
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Term
| magnetic field lines are unaffected by air, paper, glass and wood |
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Definition
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Term
| the earth's geographic North pole has north magnetic polarity and the geographic south pole has south magnetic polarity |
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Definition
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Term
| the microweber is larger that the maxwell unit |
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Definition
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Term
| flux includes total area, whereas flux density is for a specific unit area |
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Definition
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Term
| the wire wrapped ina form of a coil that causes the magnetic field to become more concentrated in an electromagnet is referred to as a.... |
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Definition
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Term
| preventing one component from affecting another through their common electric or magnetic field is called |
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Definition
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Term
| the earth's geographic......pole has south magnetic polarity. |
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Definition
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Term
| one ......per square meter is called a tesla. |
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Definition
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Term
| what are the base units of permeability? |
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Definition
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Term
| what device concentrates the magnetic field of the current in a iwre and serves as a simple RF choke |
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Definition
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Term
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Definition
| b. 1 x 10 to the eighth line |
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Term
| what magnetic effect is at the heart of such technologies as antilock brake sensors and some keyboards? |
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Definition
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Term
| capacitance is the ability of a dielectric to hold or store a magnetic charge |
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Definition
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Term
| a capacitor consists of an insulator between two conductors |
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Definition
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Term
| in the electronics industry capacitors are rarely referred to as condensors |
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Definition
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Term
| mica capacitors are often used for small capcitance values of about 10 to 5000 micro farads. |
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Definition
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Term
| a rating that specifies the maximum potential difference that can be applied across the plates without puncturing the dielecric is the .....rating. |
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Definition
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Term
| a good capacitor has a very..... resistance |
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Definition
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Term
| the unit for capacitance is |
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Definition
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Term
| surface mount capacitors are often called.....capacitors |
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Definition
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Term
| when the circuit's total capacitance is equal to the sum of the individual capacitances, the capacitors are connected in |
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Definition
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Term
| what is the inability of a capacitor to completely discharge to zero> |
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Definition
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Term
| if a capacitor-inductor analyzer is not available, a capacitor can be tested with a |
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Definition
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Term
| in the automobile industry capacitors are commonly called |
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Definition
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Term
| induced voltage is the result of flux cutting across a conductor |
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Definition
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Term
| too much current flowing through a coil will reduce its permeability and inductance |
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Definition
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Term
| a steady dc current cannot induce a voltage in a coil |
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Definition
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Term
| inductance is the characteristic that opposes any change in current. |
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Definition
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Term
| the unit of mutual inductance is the |
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Definition
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Term
| the ratio of the number of turns in the primary to the number of turns in the secondary is the....ratio |
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Definition
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Term
| the unit of apparent power is. |
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Definition
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Term
| wire wound resistors have enough....to be evident at radio frequencies |
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Definition
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Term
| what component uses mutual inductance to step up or step down an alternating voltage? |
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Definition
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Term
| with zero losses assumed for the transformer, the power in the secondary |
|
Definition
| c. is equal to the power in the primary. |
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Term
| the amount of power the transformer can deliver to a resistive load is called |
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Definition
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Term
| rc circuits are more common than rl circuits because capacitors are smaller and more economical |
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Definition
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Term
| the time constant is the time for a change of 23.5 percent in the current through L or the voltage across c. |
|
Definition
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Term
| the time constant is often symbolized by T, which is the greek letter tau. |
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Definition
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Term
| the voltage across a capacitor cannot change instantaneously |
|
Definition
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Term
| the voltage across c in an rc circuit is called a .....output |
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Definition
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Term
| the time constant is often symbolized by |
|
Definition
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Term
| a......capacitor must exhibit capacitive reactance that is one fourth or less of its series resistance at the desired frequency |
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Definition
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Term
| ......specifies the time it takes c to charge to63 percent of the charging voltage |
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Definition
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Term
| whether an rc time constant is long or short depends on the |
|
Definition
| d. pulse width of the applied voltage |
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Term
| the voltage across any inductance, vl is equal to |
|
Definition
|
|
Term
| the time constant is what percentage of change in current through L or the voltage across C? |
|
Definition
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|
Term
| the transient response of capacitive circuits is measured in terms of |
|
Definition
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|
