electricity (definitions)

Question 1

Ammeter

Answer 1

A device used to measure electric charge

Question 2

Ampere

Answer 2

Unit of current. E.g. the current in the bulb is 4 amps or amperes.

Question 3

Cell

Answer 3

A store of internal energy that can be transferred as an electric current in the circuit.

Question 4

Conductor

Answer 4

A material which allows charge to move easily through it.

Question 5

Electron

Answer 5

Sub atomic particle which flows in a circuit carrying a negative charge

Question 6

series circuit

Answer 6

a circuit connected in a way that the same current flows through each component in turn.

Question 7

Parellel circuit

Answer 7

in a parallel circuit, the current divides into two or more paths before recombining to complete the circuit

Question 8

insulator

Answer 8

a material that does not allow charge or heat to pass through it easily.

Question 9

ohms

Answer 9

the unit of electrical resistance.

Question 10

resistance

Answer 10

the opposition in an electrical component to the movement of an electrical charge through it. resistance is measured in ohms

Question 11

potential difference

Answer 11

the potential difference (or voltage) of a supply is a measure of the energy given to the charge carries in a circuit.

Question 12

volt

Answer 12

unit of voltage. E.g the voltage across the lamp was 6 Volts (V)

Question 13

Voltmeter

Answer 13

a device used to measure potential difference or voltage