Consider a solenoid of length L,N windings,and radius b (L is much longer than b).A current I is flowing through the wire.If the radius of the solenoid were doubled (becoming 2b),and all other quantities remained the same,the magnetic field
A)would remain the same.
B)would become twice as strong.
C)would become one half as strong.

Question

Quizplus · Accepted Answer

The magnetic field inside a long solenoid is given by B = μ₀(N/L)I, which is independent of the radius of the solenoid. Therefore, doubling the radius does not affect the magnetic field strength.

Consider a Solenoid of Length L,N Windings,and Radius B (L