A Solenoid Is 15 Cm Long,has a Radius of 5

question 1

Multiple Choice

A solenoid is 15 cm long,has a radius of 5 cm,and has 400 turns.If it carries a current of 4 A,the magnetic energy stored in the solenoid is

• A)84.2 mJ
• B)0.562 J
• C)3.37 J
• D)12.6 mJ
• E)None of these is correct.

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