A rectangular loop with a sliding connector of length $l = 1.0 m$ is situated in a uniform magnetic field B = 2 T perpendicular to the plane of loop. Resistance of connector is r = 2 Ω. Two resistances of 6 Ω and 3 Ω are connected as shown in figure. The external force required to keep the connector moving with a constant velocity v = 2 m/s is

Question

Infinity Learn · Accepted Answer

Motional emf  This acts as a cell of emf  E $$=$$ $$4$$ V and internal resistance  r $$=$$ $$2$$Ω .This simple circuit can be drawn as followsCurrent through the connector    magnetic force on connector             $$(Towards$$ $$left)Hence$$, the external force should be $$2$$ N towards right.

Force on a current carrying wire placed in a magnetic field

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Force on a current carrying wire placed in a magnetic field

Remember concepts with our Masterclasses.

Motional emf This acts as a cell of emf E = 4 V and internal resistance r = 2Ω .This simple circuit can be drawn as followsCurrent through the connector magnetic force on connector (Towards left)Hence, the external force should be 2 N towards right.

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