Electricity

Question 1

Ammeter

Answer 1

Used to measure the size of electric current flowing through an electric circuit.
Unit of measure : amperes (A)
Electric Current (I)

Question 2

Voltmeter

Answer 2

Voltage or potential difference is the charge in energy in an electrical system. Voltmeters are used to measure the voltage change across parts of a circuit.
Unit of measure : voltage (V).
Normally set up in parallel with the circuit.

Question 3

Resistor

Answer 3

Any device that has electrical resistance e.g. a light bulb
The resistance is measured in Ohms (omega)

Question 4

Cell

Answer 4

Chemical device that makes electricity

Question 5

Battery

Answer 5

A series of cells joined together

Question 6

Current

Answer 6

A measure of how fast the electrons are travelling around the circuit.

Question 7

Rheostat

Answer 7

A variable resistor : the longer the path the current has to travel through, the higher the resistance.

Question 8

Ohm’s law

Answer 8

Voltage = Current * Resistance
Volts = Amps * Ohms
V = I * R

Question 8

Ohm’s law

Answer 8

Voltage = Current * Resistance
Volts = Amps * Ohms
V = I * R