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Which one of the following graphs shows ...

Which one of the following graphs shows the variation of magnetic induction B which distance r from a long wire carrying a current ?

A

B

C

D

Text Solution

Verified by Experts

The correct Answer is:
D
The magnetic induction B due to a long current carrying conductor at a distance r from it is given by
`B = (mu_(0))/(4pi) ((2I)/(r))i.e. B prop 1/r`
`therefore` Variation of B with r is as shown in figure (d).
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