The inductance of a single layer solenoid of 10 turns is 5 ŒºH. Which one of the following is the correct value of inductance when the number of turns is 20 and the length is doubled.

The inductance of a single layer solenoid of 10 turns is 5 ŒºH. Whic

1.	The inductance of a single layer solenoid of 10 turns is 5 ŒºH. Which one of the following is the correct value of inductance when the number of turns is 20 and the length is doubled.
A.	10 ŒºH
B.	20 ŒºH
C.	40 ŒºH
D.	5 ŒºH
Answer» B. 20 ŒºH