Term
|
Definition
| electric current that reverses its direction regularly and is used to run appliences |
|
|
Term
|
Definition
| electric current that flows through a wire in only one direction |
|
|
Term
|
Definition
| Device that converts electrical energy to mechanical energy to do work; basically has a power supply a permanent magnet and an electromagnetic that can rotate |
|
|
Term
|
Definition
| temporary magnet made by placing an iron core inside the current carrying coil of wire and whose strength can be increased by adding more turns to the wire loop or by increasing the amount of current passing through the wire |
|
|
Term
| Electromagnetic Induction |
|
Definition
| process in which electric current is produced by moving a wire loop through a magnetic field or by moving a magnet through a loop of wire |
|
|
Term
|
Definition
| instrument that uses an electromagnet to measure electric current |
|
|
Term
|
Definition
| device that converts mechanical energy to electrical energy by rotating a wire coil through the magnetic field of permanent magnet |
|
|
Term
|
Definition
| group of atoms having aligned poles |
|
|
Term
|
Definition
| region where a magnet's magnetic force is strongest; like poles repel and opposite poles attract |
|
|
Term
|
Definition
| the properties and interactions of magnets |
|
|
Term
|
Definition
| device that increases or decreases alternating current generated by power plant so it can enter a house safely |
|
|
Term
|
Definition
| Large wheel that rotates when pushed by steam wind or water and that provides mechanical energy to a generator |
|
|
Term
|
Definition
| process of transferring charge between objects by touching or rubbing |
|
|
Term
|
Definition
| process of transferring charge between objects by bringing a charged object near a neutral object |
|
|
Term
|
Definition
| closed conduction loop through which an electric current can flow |
|
|
Term
|
Definition
| material, such as copper wire, through which an excess of elctrongs can move easily. |
|
|
Term
|
Definition
| flow of electric charge through a wire or any conductor; measured in ampres, A, in a circuit |
|
|
Term
|
Definition
| rate at which electrical energy is converted to another form of energy; expressed in watts |
|
|
Term
|
Definition
| Material that doesn't allow electrons to move through it easily |
|
|
Term
|
Definition
| unit of electrical energy, which is 100 w of power used i hour |
|
|
Term
| Law of conservation of charge |
|
Definition
| states that charge can be transferred from one object to another but cannot be created or destroyed |
|
|
Term
|
Definition
| states that the current in a circuit equals the voltage difference divided by the resistance |
|
|
Term
|
Definition
| circuit in which electric current has more than one path to follow |
|
|
Term
|
Definition
| tending for a material to oppose electron flow and change electrical energy in thermal energy and light, measured in ohms |
|
|
Term
|
Definition
| circuit in which electric current has only one path to follow |
|
|
Term
|
Definition
| electricity generated when more of one type of charge is on an object |
|
|
Term
|
Definition
| push that causes electrical charges to flow through a conductor; measured in volts |
|
|
