A uniform wire of mass m and length I can freely slide on a pair of parallel, frictionless, horizontal rails placed in a vertical constant magnetic field B (as shown in figure ). The rails are connected by a capacitor of capacitance C. The electric resistance of the circuit is zero. A constant horizontal force F acts on the middle point of wire begining t = 0 ,and the wire is at rest t = 0.

At t = 0 , electric current in the circuit is

Options

A. zero
B. `(BlCf)/((m + B^(2)l^(2)C))`
C. `(BlC F )/(m)`
D. none of these

Answer

B