Term
| Electromotive force (emf) |
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Definition
| maximum potential difference across the terminals |
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Term
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Definition
| amount of charge per unit time that passes through a surface that is perpendicular to the motion of the charges |
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Definition
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Definition
| if the charges move around the circuit in the same direction at all times |
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Term
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Definition
| if the charges move one way and then the opposite way |
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Term
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Definition
| hypothetical flow of positive charges that would have the same effect in the circuit as the movement of negative charges that actually does occur |
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Term
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Definition
| ratio of the voltage (V) applied across a piece of material to the current I through the material |
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Term
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Definition
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Term
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Definition
| voltage applied across a piece of material and current through the material |
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Term
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Definition
| the extent that a wire or an electrical device offers resistance to electrical flow |
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Term
| What is Ohm's Law important for? |
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Definition
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Term
| What side of the battery has higher potential? |
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Definition
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Term
| What will a perfect battery equal? |
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Definition
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Term
| What is true about steady circuits? |
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Definition
| The current will be the same everywhere in the circuit |
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Term
| Series resistors questions |
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Definition
| R_s = R_1 + R_2 + R_3 etc. |
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Term
| What does parallel wiring mean? |
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Definition
| the voltage will be applied across each device |
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Term
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Definition
| potential drop across each resistor is different in general (V = V_1 + V_2) |
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Term
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Definition
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Term
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Definition
| the same current goes through each of the resistors in series, but the potential drop across each resistor is different |
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Term
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Definition
| the current splits into the resistors in parallel, so the currents are different, but the potential drop across each resistor is the same |
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Term
| When two resistors are connected in parallel what happens? |
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Definition
| they draw more current than does either resistor alone |
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Term
| Reminder for math in parallel resistance |
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Definition
| add the inverses and then take the inverse |
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Term
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Definition
| a current in a circuit as a result of a voltage then P = IV |
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Term
| What is the SI unit of power? |
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Definition
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Term
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Definition
| the magnitude of the magnetic field B at any point in space |
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Term
| Conditions for a charge to experience a magnetic force |
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Definition
1.) charge must be moving
2.) velocity of the charge must have a component that is perpendicular to the direction of the magnetic field |
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Term
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Definition
| depends on component of velocity perpendicular to the magnetic field B |
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Term
| What do the fingers of the right hand rule represent? |
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Definition
Thumb: direction of force
Pointer: direction of current
Middle: direction of magnetic field |
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Term
| What symbol represents out of the page? |
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Definition
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Term
| What symbol represents into the page? |
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Definition
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Term
| Force changes direction as ______ changes direction. |
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Definition
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Term
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Definition
Thumb is now the direction of the convectional current
finger tips are the direction of the magnetic field |
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Term
| The magnetic field will be stronger _____ to the magnet. |
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Definition
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Term
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Definition
| induced emf resulting from a changing magnetic flux has a polarity that leads to an induced current whose direction is such that the induced magnetic field opposes the original flux change |
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Term
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Definition
| device for increasing or decreasing an ac voltage |
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Term
| What are the two different types of waves? |
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Definition
| transverse and longitudinal |
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Term
| Are water waves transverse or longitudinal? |
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Definition
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Term
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Definition
| cycles or patterns that are produced over and over again by the source |
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Term
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Definition
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Term
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Definition
| maximum excursion of a particle of the medium from the particles undisturbed position |
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Term
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Definition
| horizontal length of one cycle of the wave |
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Term
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Definition
| time required for one complete cycle |
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Term
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Definition
| related to the period and has units of Hz (cycles per second) |
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Term
| The distance between adjacent condensations is equal to the wavelength of the ______ ______. |
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Definition
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Term
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Definition
| sounds with a single frequency |
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Term
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Definition
| frequency in terms of the subjective quality |
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Term
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Definition
| the pressure amplitude of the wave |
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Term
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Definition
| change in frequency or pitch of the sound detected by an observer because the sound source and the observer have different velocities with respect to the medium of sound propogation |
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Term
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Definition
| two or more waves are present simultaneously at the same place, the resultant disturbance is the sum of the disturbances from the individual waves |
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Term
| Constructive interference |
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Definition
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Term
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Definition
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Term
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Definition
| the difference between the two sound frequency |
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Term
| The principle of linear superposition |
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Definition
| when two or more waves are present simultaneously at the same place, the resultant disturbance is the sum of the disturbances from the individual waves |
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