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A straight wire of diametre 0.5 mm carry...

A straight wire of diametre 0.5 mm carrying a current of 1 A is replaced by another wire of 1mm diametre carrying same current. The strenth of magnetic field far away is

A

twice the earlier value

B

same as the earlier value

C

one-half of the earlier value

D

one-quarter of the earlier value

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The correct Answer is:
b
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NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)-MAGNETIC EFFECT OF CURRENT-Exercise
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