A) \[-\frac{{{W}_{2}}-{{W}_{1}}}{5\ Rnt}\]
B) \[-\frac{n({{W}_{2}}-{{W}_{1}})}{5\ Rt}\]
C) \[-\frac{({{W}_{2}}-{{W}_{1}})}{Rnt}\]
D) \[-\frac{n({{W}_{2}}-{{W}_{1}})}{Rt}\]
Correct Answer: B
Solution :
\[i=\frac{e}{R}=\frac{-N}{R}\frac{({{\varphi }_{2}}-{{\varphi }_{1}})}{\Delta t}=\frac{-n({{W}_{2}}-{{W}_{1}})}{5Rt}\]
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