A Very Short Solenoid Contains N = 20 Circular Loops

question 8

Multiple Choice

A very short solenoid contains N = 20 circular loops of wire.The radius of the loop is R = 0.5 meters,and the length of the solenoid is d = 0.02 meters.Approximately what is the magnetic field in the center of the solenoid?

• A)µ_oN I/d
• B)µ_oN I/(2R)
• C)µ_oN I/(2dR)
• D)µ_oN I/(2pR)

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