A long solenoid of length 2.0 m and n=300 turns/m carries a current of 4.0 A.It stores an energy of 3.4 J.What is the cross sectional area of the solenoid?
A) 0.70 m2
B) 1.2 m2
C) 1.4 m2
D) 1.7 m2
E) 1.9 m2
Correct Answer:
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