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) remain the same.
B) become twice as strong.
C) become one half as strong.