3.
If the resistance of wire is made 4 times keeping potential difference across it constant. Then the number of times heat produced in it varies by
a)4
b)1/4
c)2
d)1/2
Answers
Answered by
1
Answer:
General expression for heat produced in a wire of resistance "r" in time "t" is given as : Now , the question says that the resistance was increased by four times keeping the potential constant. So, new resistance r2 = 4r. So, heat produced decreases by 4 times.
Answered by
1
Answer:
4 is the answer.
Explanation:
General expression for heat produced in a wire of resistance "r" in time "t" is given as : Now , the question says that the resistance was increased by four times keeping the potential constant. So, new resistance r2 = 4r. So, heat produced decreases by 4 times.
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