Consider an Ideal Solenoid of Length L,N Windings,and Radius B

question 21

Multiple Choice

Consider an ideal solenoid of length L,N windings,and radius b (L is much longer than b) .A current I is flowing through the wire windings.If the radius of the solenoid is doubled to 2b,but all the other quantities remain the same,the magnetic field inside the solenoid will

• A)remain the same.
• B)become twice as strong as initially.
• C)become one-half as strong as initially.
• D)become four times as strong as initially.
• E)become one-fourth as strong as initially.

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