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Q.

Which of the following statement is wrong..

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a

Bimetal is used in metal themometer

b

Bimetal is used to generate electricity 

c

Bimetal relays are used to open or closed electric circuits

d

Bimetal is used in thermostat for regulating heating or cooling of rooms. 

answer is B.

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Detailed Solution

Bimetal strips are used in miniature circuit breakers to protect circuits from excess current. A coil of wire is used to heat a bimetal strip, which bends and operates a linkage that unlatches a spring-operated contact. This interrupts the circuit and can be reset when the bimetal strip has cooled down.

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