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A straight wire of diameter 0.5 mm carry...

A straight wire of diameter `0.5 mm` carrying a current of `1 A` is replaced by another wire of `1 mm` diameter carrying the same current. The strength of magnetic field far away is

A

one quarter of the earlier value

B

No change

C

Twice the earlier value

D

One half of the earlier value

Text Solution

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The correct Answer is:
B
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