the length of thin wire required to manufacture a solenoid of inductance L and length l,(if cross section diameter is considered less than its lenght)is
1) {(pie)Ll/2(nu not)}1/2
2) {4(pie)Ll/(nu not)}1/2
3) {2(pie)Ll/(nu not)}1/2
4) {(pie)Li/(nu not)}1/2
The inductance of a solenoid is given by,
And the length of the wire needed to make it,
and
So,
2) is the right answer.
And the length of the wire needed to make it,
and
So,
2) is the right answer.