A) \[{{10}^{3}}\,V\]
B) \[-23\times {{10}^{3}}\,V\]
C) \[23\times {{10}^{3}}\,V\]
D) \[Zero\]
Correct Answer: C
Solution :
Rate of decay of current between t = 5 ms to 6 ms \[=\frac{di}{dt}=-\,\text{(Slope of the line }BC)\] \[=-\,\left( \frac{5}{1\times {{10}^{-3}}} \right)=-\,5\times {{10}^{3}}A/s.\] Hence induced emf \[e=-\,L\frac{di}{dt}=-\,4.6\times (-\,5\times {{10}^{3}})=23\times {{10}^{3}}V.\]
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