Physics - electricity

3. An electric current flowing in one direction only.
5. These are automatically operated electrical switches that protect electrical circuits from overloading or short circuiting.
8. Material that does not allow charge or heat to pass through it easily.
9. An electromotive force or potential difference expressed in volts.
10. An electrical component that protects circuits and electrical devices from overload by melting when the current becomes too high.
11. A stationary electric charge, typically produced by friction, which causes sparks or crackling or the attraction of dust or hair.

1. An electric current that reverses its direction many times a second at regular intervals, typically used in power supplies.
2. An electrical quantity that measures how the device or material reduces the electric current flow through it.
4. The potential difference (or voltage) of a supply is a measure of the energy given to the charge carriers in a circuit, units volts (V).
6. Cause injury or death by an electric shock.
7. A flow of electricity which results from the ordered directional movement of electrically charged particles.