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Q.

Axis of a solid cylinder of infinite length and radius R lies along y – axis it carries a uniformly distributed current ‘I’ along + y direction. Magnetic field at a point R2,y,R2 is

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a

μ0I4πR(i^−k^)

b

μ0I2πR(j^−k^)

c

μ0I4πRj^

d

μ0I4πR(i^+k^)

answer is A.

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Detailed Solution

Magnitude of field at Point PR2,y,R2 is B=μ0jr2=μ0I2πR2×R2=μ0I22πRUnit vector in the direction of field,B^=i^−k^2
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