CBSE Class 10 Science 2023 Delhi Set 1

Question : 15

Total: 39

The resistance of a resistor is reduced to half of its initial value. If other parameters of the electrical circuit remain unaltered, the amount of heat produced in the resistor will become:

four times
two times
half
one forth

Solution:

As H=V2t∕R, if V is constant, then H is inversely proportional to R. So H will become double if R becomes 1∕2.

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