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Electromagnetic Induction


A rectangular loop with a sliding connector of length l = 1.0 m is situated in a uniform magnetic field B = 2T perpendicular to the plane of loop. Resistance of connector is r = 2


Ω. Two resistances of 6Ω and 3Ω are connected as shown in figure. The external force required to keep the connector moving with a constant velocity v = 2m/s is 





A Rectangular Loop With A Sliding Connector Of Length L = 1....
Options:
A. 6N
B. 4N
C. 2N
D. 1N

 Next Question
Answer: Option C
: C

Motional emf e=Bvle=2×2×1=4 V
This acts as a cell of emf E=4V and internal resistance r=2Ω.
This simple circuit can be drwan as follows


A Rectangular Loop With A Sliding Connector Of Length L = 1....
Current through the connector i=42+2=1 A
Magnetic force on connector Fm==Bil=2×1×1=2 N (Towards left)

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