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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > Figure shows a horizontal wire MN of length I and mass mis placed in a magnetic field B. The ends of wire are bent and dipped in two bowls containing Hg which are connected to an external circuit as shown. If key is pressed for a short time δt.due to which a charge q suddenly flows in the circuit. Find the maximum height above initial level the wire MN, it will jump.

Figure shows a horizontal wire MN of length I and mass mis placed in a magnetic field B. The ends of wire are bent and dipped in two bowls containing Hg which are connected to an external circuit as shown. If key is pressed for a short time δt.due to which a charge q suddenly flows in the circuit. Find the maximum height above initial level the wire MN, it will jump.

find the resultant magnetic force and torque about C and P. In the figure