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Question
The energy stored in the magnetic field in a solenoid 30 cm long and 3 cm diameter wound with 1000 turns of wire carrying a current at 10 amp, is
Options:
A .   0.015 joule.
B .   1.15 joule.
C .   0.15 joule.
D .   0.015 joule.
Answer: Option C
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