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The adjacent figure shows, the cross-section of a long rod with its length perpendicular to the plane of the paper. It carries constant current flowing along its length. `B_(1),B_(2),B_(3)"and"B_(4)` respectively respresent the magnetic fields due to the current in the rod at points `1,2,3"and"4` lying at different separations from the centre O as shown in the figure. which of the following shall hold true?

A

`B_(1)gtB_(2) ne 0`

B

`B_(2)gtB_(3)ne0`

C

`B_(1)=B_(2)=B_(3)ne0`

D

`B_(2)gtB_(4)ne0`

Text Solution

Verified by Experts

The correct Answer is:
d
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