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Questions  

A heater coil is cut in two equal parts and only one part is now used in the heater. The heat generated will now be

a
four times
b
one fourth
c
halved
d
doubled

detailed solution

Correct option is D

The heat generated H is given byH=V2tR  or  H∝1Rwhen .R is halved, the heat produced H will be doubled

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