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

Multiple Choice

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.