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A current I is flowing in a straight con...

A current I is flowing in a straight conductor of length L. The magnetic induction at a point distant `(L)/(4)` from its centre will be

A

(a)1

B

(b)2

C

(c)`1//2`

D

(d)4

Text Solution

Verified by Experts

The correct Answer is:
A
Magnetic field in circular coil A is `B_(A)=(mu_(0)NI)/(2R)` where R is radiusand I is current flowing in coil.
Similarly `B_(B)=(mu_(0)N(2I))/(2.(2R))=(mu_(0)NI)/(2R):. (B_(A))/(B_(B))=1`
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