Question

40. A fuse wire melts at 5 A. If it is desired that
the fuse wire of same material melt at 10 A,
then whether the new fuse wire should be of
smaller or larger radius than the earlier one?
Give reasons for your answer.
​

Answer 1

Answer:

As resistivity of material is directly proportional to square of radius of wire,

the new wire must have larger radius in order to sustain the current of 10A

Explanation:

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