Electricity

1

The transfer of electrons between two objects due to friction is called:

A Static electricity B Current electricity C Alternating current D Direct current

2

What is the flow of electric charge called?

A Electric current B Electric voltage C Electric resistance D Electric power

3

A device that provides electrical energy in a circuit is called:

A Cell B Switch C Resistor D Wire

4

The heating effect of electric current is used in:

A All of these B Electric iron C Electric heater D Electric bulb

5

The rate at which electrical energy is used is called:

A Power B Current C Voltage D Resistance

6

A fuse wire is made of a material with:

A Low melting point B High melting point C High resistance D Low resistance

7

In a circuit, the positive terminal of a cell is connected to:

A The positive side of the load B The negative side of the load C The switch D The fuse

8

Which of the following is an example of a bad conductor?

A Glass B Iron C Copper D Aluminum

9

What happens to the total resistance in a parallel circuit when more resistors are added?

A It decreases B It increases C It stays the same D It becomes infinite

10

Which of the following is a source of electricity?

A Battery B Switch C Fuse D Resistor

11

What happens to the resistance of a wire as its length increases?

A It increases B It decreases C It stays the same D It becomes zero

12

Which of the following is a safety device used in electrical circuits?

A Fuse B Switch C Cell D Resistor

13

A complete circuit must have:

A All of these B A source of energy C A load D Connecting wires

14

In a parallel circuit, the voltage across each branch is:

A The same B Different C Zero D Half of the source

15

Which of the following is a conductor of electricity?

A Copper B Rubber C Plastic D Glass

16

The complete path through which electricity flows is called:

A Circuit B Wire C Switch D Battery

17

Which of the following is an electrical safety rule?

A Never touch a switch with wet hands B Always use metal wires for all appliances C Use a wire with no insulation D Connect many appliances to one socket

18

The unit of electrical resistance is:

A Ohm B Volt C Ampere D Watt

19

Which of the following materials is a semiconductor?

A Silicon B Copper C Rubber D Plastic

20

The device used to measure electric current is:

A Ammeter B Voltmeter C Ohmmeter D Galvanometer

21

Which of the following is an insulator?

A Wood B Iron C Copper D Aluminum

22

What is the function of a switch in an electric circuit?

A To control the flow of current B To produce current C To store charge D To increase resistance

23

Which of the following is a use of electromagnets?

A All of these B Electric bells C Maglev trains D Speakers

24

Which of the following is an example of a static electricity?

A Lightning B Current in a wire C Battery power D Mains electricity

25

A material that does not allow electricity to flow through it is called:

A Insulator B Conductor C Semiconductor D Superconductor