MagnetismHard

Question

A conducting rod of length l and mass m is moving down a smooth inclined plane of inclination θ with constant velocity v in fig. A current I is flowing in the conductor in a direction perpendicular to paper inwards. A vertically upward magnetic field  exists in space. Then magnitude of magnetic is

Options

A.sin θ
B.tan θ
C.
D.

Solution

For constant velocity a = 0 = gsinθ -
⇒ B =

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