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A cylinder wire of radius R is carrying ...

A cylinder wire of radius R is carrying uniformly distributed current I over its cross-section. If a circular loop of radius r is taken as amperian loop, then the variation value of `oint vec(B)* vec(dl)` over this loop with radius 'r' of loop will be best represented by

A

B

C

D

Text Solution

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The correct Answer is:
B
`ointvecB.vecdl=mu_(0)(i)/(piR^(2))xxpir^(2)`
`=(mu_(0)ir^(2))/R^(2) ointvecB.vecdl=mu_(0)i`
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RESONANCE ENGLISH-ELECTRODYNAMICS-Exercise-1 PART-2
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