A) \[62\centerdot 5\,mW\]
B) \[625\,mW\]
C) \[6\centerdot 25\,mW\]
D) \[12\centerdot 5\,mW\]
Correct Answer: C
Solution :
Here, \[l=0\,.\,1\,m,\,n=1\,\,m\,{{s}^{-1}}\] \[I=50\,\,A,\,B=\,1.\,25\,mT=1\,.25\times {{10}^{-3}}\,\,T\] The induced e.m.f. is, \[\varepsilon =B/v\] The mechanical power is \[P=\varepsilon I=B/vI=1\,.\,25\times {{10}^{-3}}\,\times \,0\,.\,1\times 1\times 50\] \[=\,6\,.\,25\times {{10}^{-3}}\,W=6\,.\,25\,mW\].You need to login to perform this action.
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