A rectangular loop with a sliding conne...

A rectangular loop with a sliding connector of length l=10m` is the situated in a uniform magnetic for B=2T perpendicular to the plane of the loobs. Resistance of conductor is `r=2Omega`. Two resistances at a`6Omega and 3Omega` are connected as shown in the figure. The external force required to keep the conductor moving with a constant velocity v=2m/s

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