Friday, 22 April 2016

A long wire carrying 100 amp is placed in an external external magnetic field of 50 gauss. The wire is at right angles to the field

(a) There will not be any null field
(b) The field lines terminate on the wire
(c) The field is null surrounding the vicinity of the wire
(d) The .field is null above the wire and crowded below

Ans: D

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