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PUMPA - SMART LEARNING

எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்

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Subjects
Science CBSE
Class 7
Electric current and its effects
Circuits, heating and magnetic effects

11. Safety equipments used in circuits

Exercise condition:

9 m.

Read the options and select the best one:

1. Assertion (A): Compact Fluorescent Lamp (CFL) is better than the incandescent electric bulbs.
Reason (R): Compact Fluorescent Lamp (CFL) is more efficient in producing electricity.

Both A and R are true but R is not the correct explanation of A
A is true but R is false
Both A and R are true and R is the correct explanation of A
A is false but R is true

2. Assertion (A): Electrical fuses are inserted in electric circuits of all buildings.
Reason (R): Only a minimum amount of current can flow in the fuse.

A is true but R is false
A is false but R is true
Both A and R are true and R is the correct explanation of A
Both A and R are true but R is not the correct explanation of A

3. Assertion (A): MCB automatically turns off the circuit if the current exceeds the safety limit.
Reason (R): Instead of fuses, an element is used in the circuits.

A is true but R is false
Both A and R are true but R is not the correct explanation of A
A is false but R is true
Both A and R are true and R is the correct explanation of A

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