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 length of the solenoid became twice as long (2L) ,and all other quantities remained the same,the magnetic field inside the solenoid would

A) stay the same.
B) become twice as strong as initially.
C) become half as strong as initially.