A homogeneous magnetic field B is perpendicular to a sufficiently long fixed track of width l which is horizontal. A frictionless rod of mass m straddles the two rail of the track as shown in the figure. Entir arrangement lies in horizontal plane. For the situation suggested in column-II match the appropriate entries in column-II. The rails are also resistanceless.

A homogeneous magnetic field B is perpendicular to a sufficiently long

1.	A homogeneous magnetic field B is perpendicular to a sufficiently long fixed track of width l which is horizontal. A frictionless rod of mass m straddles the two rail of the track as shown in the figure. Entir arrangement lies in horizontal plane. For the situation suggested in column-II match the appropriate entries in column-II. The rails are also resistanceless.
Answer» Correct Answer - Ararr(P,Q);Brarr(Q)Crarr(R )Drarr(P,S,T) For (A): `(V-Blv)/(R )=I, F=(V-Blv)/(R )xxBl` For (B): rod is non-conducting so no current For (c ): No energy dissipated as no resistance `R rarr` Red executes SHM F=ilB to left `implies f_("ext")` to right F=ilB, `(Ldi)/(dt)=Blv` implies not possible to move with constant v.

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