A rod with resistance R lies across frictionless conducting rails in a constant uniform magnetic field B, as shown.Assume the rails have negligible resistance.The magnitude of the force that must be applied by a person to pull the rod to the right at constant speed v is: A)0 B)BLv C)BLv/R D)B²L²v/R E)B²Lxv/R

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The Answer of A rod with resistance R lies across frictionless conducting rails in a constant uniform magnetic field B, as shown.Assume the rails have negligible resistance.The magnitude of the force that must be applied by a person to pull the rod to the right at constant speed v is: A)0 B)BLv C)BLv/R D)B²L²v/R E)B²Lxv/R

A Rod with Resistance R Lies Across Frictionless Conducting Rails