A) 41.5 J
B) 62.50 J
C) 125 J
D) 250 J
Correct Answer: B
Solution :
\[U=\frac{1}{2}L{{i}^{2}}=\frac{1}{2}L{{\left( \frac{E}{R} \right)}^{2}}=\frac{1}{2}\times 5\times {{\left( \frac{100}{20} \right)}^{2}}=62.50J\]
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