A) \[4J\]
B) \[2J\]
C) \[5J\]
D) \[1J\]
Correct Answer: D
Solution :
: Here, Inductance, \[L=2H\], current, \[\text{I}=1\text{ }A\] Magnetic energy stored in the solenoid is \[U=\frac{1}{2}L{{I}^{2}}=\frac{1}{2}\times 2\times {{(1)}^{2}}=1J\]
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