MHT CET Physics question

Not in JEE Advanced syllabus

A T.G. shows no deflection when a current is passed through it. But when the current is reversed, it gives a deflection of then the plane of the coil is

(A)In the magnetic meridian
(B)Normal to the magnetic meridianCorrect
(C)At an angle of to the magnetic meridian
(D)At an angle of to the magnetic meridian

Answer: (B)

Solution

If the coil is normal to the meridian, its field lies along : the needle stays at 0 for one current direction, and on reversal the opposing field

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Question ID VK-078467