+3 votes
in JEE by kratos

An equilateral triangular frame PQR of mass 2kg and side 1m is at rest under the influence of horizontal magnetic field 10T and gravitational field as shown in the figure. The plane of the frame is vertical find the magnitude of current (in ampere) in the frame so that the frame *** at rest [Neglect EMF induced due to motion of the loop] (g = 10 m/s2)

1 Answer

+2 votes
by kratos
 
Best answer

From lenz'* law the current i in the loop is clockwise For equilibrium

mg = Bla/2

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