Electricity and Circuits Test

Result

Electricity and Circuits Test - 16

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Weekly Quiz Competition

Question 1
1 / -0

Three identical bulbs are connected to a battery as shown in the figure. What will happen when the circuit is closed?

A
R will be bright but Q and P dim

B
P, Q and R will be equally bright

C
Q and R will immediately burnout

D
P will be bright but Q and R dim

Solution
Question 2
1 / -0

Why shouldnt the two terminals of an electric cell be joined directly without a switch?

A
The chemicals in the electric cell get used up very fast and the cell stops working

B
It is dangerous

C
Electric cell will explode

D
None of them

Solution

Never join the two terminals of the electric cell without connecting them through a switch and a device like a bulb. If you do so, the chemicals in the electric cell get used up very fast and the cell stops working.
Question 3
1 / -0

Which among the following statements about an electric cell is false?

A
An electric cell produces electricity from the chemicals stored inside it.

B
It has a neutral terminal.

C
It has a positive terminal.

D
It has a negative terminal.

Solution

An electric cell produces electricity from the chemicals stored inside it. It has 2 terminals - positive and negative terminal.
It don't have a neutral terminal.
Question 4
1 / -0

_______________ makes it possible to light our homes, roads, offices, markets and factories even after sunset.

A
Electricity

B
Motion of objects

C
Magnets

D
Food

Solution

Electricity makes it possible to light our homes, roads, offices, markets and factories even after sunset.
Question 5
1 / -0

When the chemicals in the electric cell are used up, the electric cell stops working. Then, what should we do?

A
We should keep using the same electric cell

B
The electric cell has to be replaced with a new one

C
Both options are correct

D
All options are wrong

Solution

When the chemicals in the electric cell are used up, the electric cell stops working and stops producing electricity. The electric cell then has to be replaced with a new one.
Question 6
1 / -0

The figure shown above is called an ___________.

A
Electric Cell

B
Torch

C
Bulb

D
Light

Solution

The given figure is an electric cell. The metal cap(above) and metal disc(below) on an electric cell are positive terminal and negative terminal respectively.A cell is used to supply electricity to small devices such as calculator and wristwatch.
Question 7
1 / -0

Electric cells are used in

A
Alarm clocks

B
Wrist watches

C
Cameras

D
All of the above

Solution

Electric cells are used in alarm clocks, wrist watches, transistor radios, cameras and many other devices.
Question 8
1 / -0

What does the above danger sign shown on poles, electric substations indicate?

A
It is to warn people that electricity can be dangerous if not handled properly.

B
It is to warn people that there is ghost.

C
It is to warn people that there is dangerous animal.

D
It indicates that electricity is not dangerous.

Solution

It is to warn people that electricity can be dangerous if not handled properly. Carelessness in handling electricity and electric devices can cause severe injuries and sometimes even death. Hence, you should never attempt to experiment with the electric wires and sockets. Also, the electricity generated by portable generators is equally dangerous. Use only electric cells for all activities related to electricity.
Question 9
1 / -0

The terminals of an electric cell are _________ and __________.

A
Positive and Positive

B
Negative and Negative

C
Positive and Negative

D
None of them

Solution

An electric cell is a device which produces a small amount of electricity from the chemicals stored inside it. It has two ends .The two ends of the cell are called terminals and one end is the positive terminal and the other end is the negative terminal.
Question 10
1 / -0

The metal cap and metal disc on an electric cell are _________ and _________ respectively.

A
'Positive terminal' and 'Positive terminal'

B
'Negative terminal' and 'Positive terminal'

C
'Positive terminal' and 'Negative terminal'

D
'Negative terminal' and 'Negative terminal'

Solution

The metal cap and metal disc on an electric cell are positive terminals and negative terminal respectively.