Magnetic Effects Of Current Question 34
Question: Field at the centre of a circular coil of radius r, through which a current I flows is [MP PMT 1993]
Options:
A) Directly proportional to r
B) Inversely proportional to I
C) Directly proportional to I
D) Directly proportional to $ I^{2} $
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Answer:
Correct Answer: C
Solution:
Field at the centre of a circular coil of radius $ r $ is $ B=\frac{{\mu_{o}}I}{2r} $
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