Electricity and Magnetism

2. A material or object that blocks the flow of electrical charge or thermal energy.
3. A diagram that shows the direction and shape of a magnetic field.
6. The unit for potential difference
9. The flow of electrical charge, measured in amps (A). Represented in an equation by the letter I.
10. The degree to which a component opposes the flow of electrical charge, measured in ohms (Ω). Represented in an equation by the letter R.
12. A region at each end of a magnet where the magnetic field is strongest.
13. A measure of the quantity of charged particles moving in a circuit, measured in coulombs (C). Represented by the letter Q.
15. The area around a charged object where another charged object experiences a non-contact force.
17. The unit for resistance.
18. Stationary electrical charge stored on an insulating material when electrons are transferred between objects.
21. The area around a magnet, electric current or moving charged particle where there is a magnetic force.
22. A force that causes objects to move away from each other.
23. 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.

1. A circuit in which the current divides into two or more paths before recombining to complete the circuit.
4. A coil of wire carrying a current with an iron core.
5. A circuit in which the current follows one path.
7. The unit for current.
8. A force that causes objects to move towards each other.
11. The transfer of electrical charge (or thermal energy) through a substance.
14. A motor that takes energy from a direct current and transfers it to a kinetic store.
16. A device containing a magnetic needle on a pivot that indicates North when held on the Earth's surface.
19. 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).
20. An individual part of an electric circuit.