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Q.

Which of the following devices is not based on the heating effect of electric current?


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a

Water Heater

b

Fuse

c

Bulb

d

Miniature Circuit Breaker 

answer is D.

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Detailed Solution

Miniature Circuit Breaker is not based on the heating effect of electric current.
Whenever there’s a motion of current in a body, heating is produced. This phenomenon is called the heating effect. The water heater, fuse and bulb are the devices which are based on the heating effect of electric current. The MCB or Miniature Circuit Breaker is not based on the heating effect of electric current. Instead it is based on the magnetic effect of electric current.
 
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