1.

As shown in the figure a metal rod makes contact and complete the circuit. The circuit is perpendicular to the magnetic field with \[B=0.15\,tesla.\] If the resistance is \[3\,\Omega \], force needed to move the rod as indicated with a constant speed of \[2m/sec\] is     [MP PET 1994]

A. \[3.75\times {{10}^{-3}}\]N   
B. \[3.75\times {{10}^{-2}}\,N\]
C. Nature of the material 
D. \[3.75\times {{10}^{-4}}N\]
Answer» B. \[3.75\times {{10}^{-2}}\,N\]


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