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(A):However long a fuse wire may be, the safe current that can be allowed is the same through it
(R):The safe current that can be allowed to pass through a fuse wire depends on the radius of wire

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Both ‘A’ and ‘R’ are true and ‘R’ is the correct explanation of ‘A’

Both ‘A’ and ‘R’ are true and ‘R’ is not the correct explanation of A

‘A’ is true and ‘R’ is false

‘A’ is false and ‘R’ is false

answer is B.

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Detailed Solution

The safe current is independent of the length and hence it will be same for any length of a given wire.

Both (A) and (R) are both correct but the safe current does not depend on area alone but on various facts like the material property, temperature, voltage rating etc.

Hence assertion is correct and reason is correct but reason is not explaining the assertion.

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