Electricity and Magnetism

5. The flow of electrical charge, measured in amps (A). Represented in an equation by the letter I.
8. The area around a magnet, electric current or moving charged particle where there is a magnetic force.
10. flow A measure of the quantity of charged particles moving in a circuit, measured in coulombs (C). Represented by the letter Q.
11. A measure of the work done or the energy transferred to a component by each coulomb of charge that passes through it, measured in volts (V). Represented by the letter V.
12. A motor that takes energy from a direct current and transfers it to a kinetic store.
14. The transfer of electrical charge (or thermal energy) through a substance.
15. A device containing a magnetic needle on a pivot that indicates North when held on the Earth's surface.
16. The unit for potential difference
18. A circuit in which the current divides into two or more paths before recombining to complete the circuit.
21. The degree to which a component opposes the flow of electrical charge, measured in ohms (Ω). Represented in an equation by the letter R.
22. A force that causes objects to move away from each other.
23. A diagram that shows the direction and shape of a magnetic field.

1. The unit for current.
2. A force that causes objects to move towards each other.
3. A particle with a relative charge of -1 and a very small relative mass. It orbits the nucleus of an atom in energy levels (shells).
4. Stationary electrical charge stored on an insulating material when electrons are transferred between objects.
6. A region at each end of a magnet where the magnetic field is strongest.
7. A coil of wire carrying a current with an iron core.
9. An individual part of an electric circuit.
13. The area around a charged object where another charged object experiences a non-contact force.
17. The unit for resistance.
19. A circuit in which the current follows one path.
20. A material or object that blocks the flow of electrical charge or thermal energy.