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1. |
The energy stored in the magnetic field of solenoid 30 cm long and 3 cm diameter wound with 1000 turns of wire carrying a current of 10 A is _____ J. |
A. | 5 joule |
B. | 0.15 joule |
C. | 15 joule |
D. | All of the above |
Answer» C. 15 joule | |