Electricity

Question 1

Static electricity

Answer 1

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

Question 2

A polythene rod

Answer 2

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

Question 3

A Perspex rod

Answer 3

Loses electrons if it is rubbed by a woollen cloth it becomes positively charged

Question 4

Electric current

Answer 4

An electric current is caused by the flow of electrons through a good conducted such as metal

Question 5

Good insulator

Answer 5

A good insulators does not allow currents 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

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

Question 8

Batteries

Answer 8

Energy provided by a battery or power pack is needed to move the current around the circuit
The battery pumps electrons from its negative end around a circuit. The electrons travel all the way and are attracted back to the positive end of the battery

Question 9

Potential difference

Answer 9

The difference in electrical pressure between the positives and negative ends of a battery is called the potential difference

Question 10

Voltage

Answer 10

When there is a potential difference electricity will flow this potential difference is known as voltage and is measured in volts

Question 11

Resistance

Answer 11

Resistance is the opposite to the flow of electrons. The unit is the Ohm and it is measured using ohmmeter. If a resister is placed in an electric circuit it will slow down the flow of electrons

Question 12

Ohms law

Answer 12

Ohms law states that the voltage is directly proportional to current