Electricity

Question 1

Static electricity

Answer 1

A build up of electric charge that can occur on good insulators eg polythene and Perspex rods

Question 2

Polythene rod

Answer 2

Gains electrons if a woollen cloth is rubbed on it (becomes negatively charged)

Question 3

Perspex rod

Answer 3

Loses electrons if it is top rubbed by a wooden cloth (becomes negatively charged)

Question 4

Electric current

Answer 4

Caused by the flow of electrons through a good conductor such as a metal

Question 5

Good insulator

Answer 5

Does not allow electric currents to flow

Question 6

Closed circuit

Answer 6

Needed for the current to flow

Question 7

If there is a break in the circuit

Answer 7

The energy won’t flow and the electrical energy can’t get through

Question 8

Battery

Answer 8

Pumps electrons from its negative end around a circuit. The electrons travel all the way around and are attracted to the positive end of the battery.

Question 9

Potential difference

Answer 9

The difference in Electrical pressure between the positive and negative ends of a battery/ powerpack.

Question 10

Voltage

Answer 10

The potential difference is known as voltage is measured in volts

Question 11

Resistance

Answer 11

The resistance is the opposition to the flow of electrons. The unit is the ohm (Ω), and it is measured using an ohmmeter

Question 12

Resistor

Answer 12

If placed in an electric circuit, it will slow down the flow of electrons.

Question 13

Ohm’s law

Answer 13

Voltage is directly proportional to current