Electricity

Question 1

Static electricity

Answer 1

Is a build up of electric charge that can occur on good insulators

Question 2

Polythene rod

Answer 2

Gains electrons if a woollen cloth is rubbed on it

Question 3

Perspex rod

Answer 3

Loses electrons if it is rubbed by a woollen cloth

Question 4

Electric current

Answer 4

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

Question 5

Good insulator

Answer 5

Does not allow electric current to flow

Question 6

Closed circuit

Answer 6

Is needed for the current to flow

Question 7

If there is a break in the circuit

Answer 7

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

Question 8

Batteries

Answer 8

Pumps electrons from its negative end around a circuit. The electrons travel all the way around and are attracted back 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/power pack. This is known as voltage and is measured in volts

Question 10

Resistance

Answer 10

Is the opposition to the flow of electrons. The unit is Ohm, and is measured using an Omhmeter

Question 11

A resistor

Answer 11

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