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Domestic Electric Circuits

An MCB which ...

Question

An MCB which cuts off the electricity supply in case of short-circuiting or overloading works on the :

(a) chemical effect of current

(b) heating effect of current

(c) magnetic effect of current
(d) electroplating effect of current

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Solution

The correct option is (c) magnetic effect of current.
MCB(miniature circuit breaker) contains an electromagnet. When the current increases heavily, the electromagnet become strong to separate the pair of contacts and break the circuit.

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(a) chemical effect of current
(b) magnetic effect of current
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Q. Question 1
Illustarte the following effects of electric current:
(a) Heating effect
(b) Chemical effect
(c) Magnetic effect

Q. Question 4

When the electric current is passed through a conducting solution, there is a change of colour of the solution. This indicates

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Q. An MCB works on the principle of ___ effect of electric current.

Q. Question 1

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(a) heating effect only.
(b) chemical effect only.
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