1.

A 0.1 m long conductor carrying a current of 50 I A is perpendicular to a magnetic field of 1.21 mT. The mechanical power to move the conductor 1 with a speed of \[1\,m{{s}^{-1}}\] is                     

A. 0.25 m W 
B. 6.25 m W          
C. 0.625 W 
D. 1W
Answer» C. 0.625 W 


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