Electricity and Circuits Test

Result

Electricity and Circuits Test - 5

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Weekly Quiz Competition

Question 1
1 / -0

Most of the electricity carrying wires along the roads do not have a plastic covering like the wires used at homes. But why is there no substantial loss of energy?

A
Air is not affected by gravity.

B
Air is a bad conductor of electricity.

C
Electricity flows very fast near highways.

D
Current rating is high near highways.

Solution

Air is a bad conductor of electricity. Hence, there is no substantial loss of energy during the flow of electricity in the overhead electric wires along the road.
Question 2
1 / -0

What is the filament of an electric bulb ' usually made up of?

A
A thin wire with many coils

B
A thick wire with many coils

C
A thin straight wire

D
A thick straight wire

Solution

The filament of an electric bulb is usually made up of a thin wire with many coils.
Question 3
1 / -0

Why are the electric wires used in homes usually covered with materials like plastic or rubber?

A
To prevent rusting

B
To make handling easier

C
To prevent shock and short circuits

D
To make them look beautiful

Solution

Electric wires used in homes generally have a plastic or rubber covering so as to prevent shocks when we touch them. Insulation also prevents the two live wires coming in contact causing a short circuit.
Question 4
1 / -0

Why is a switch used in a circuit?

A
To save energy

B
To complete or break a circuit

C
To prevent electric shocks

D
To make the bulb glow easily

Solution

A switch is used to complete or break a circuit.
Question 5
1 / -0

Which of the following does NOT conduct electricity?

A
Aluminium

B
Salt solution

C
Ceramic articles

D
Silver

Solution

Ceramic articles do not conduct electricity.
Question 6
1 / -0

Which of the following energy conversions take place in a torch?

A
Electrical → chemical → light

B
Chemical → electrical → light

C
Electrical → light → chemical

D
Light → chemical → electrical

Solution

A torchlight is powered by dry cells which convert chemical energy to electrical energy. This in turn, is converted into light energy by the torch light.
Question 7
1 / -0

It why is tungsten used as a filament in electric bulbs?

A
It is non-luminous.

B
It is a soft metal.

C
It has a high melting point.

D
It has a low melting point.

Solution

Tungsten has a high melting point. Hence, it is used as a filament in electric bulbs.

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Re-Attempt Weekly Quiz Competition

Electricity and Circuits Test - 5

Result

Electricity and Circuits Test - 5

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SHARING IS CARING

Question 1

Air is not affected by gravity.

Air is a bad conductor of electricity.

Electricity flows very fast near highways.

Current rating is high near highways.

Solution

Question 2

A thin wire with many coils

A thick wire with many coils

A thin straight wire

A thick straight wire

Solution

Question 3

To prevent rusting

To make handling easier

To prevent shock and short circuits

To make them look beautiful

Solution

Question 4

To save energy

To complete or break a circuit

To prevent electric shocks

To make the bulb glow easily

Solution

Question 5

Aluminium

Salt solution

Ceramic articles

Silver

Solution

Question 6

Electrical → chemical → light

Chemical → electrical → light

Electrical → light → chemical

Light → chemical → electrical

Solution

Question 7

It is non-luminous.

It is a soft metal.

It has a high melting point.

It has a low melting point.

Solution

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