Question 115: Electromagnetic Induction

Question

The total number of turns and cross-section area
in a solenoid is fixed. However, its length L is varied
by adjusting the separation between windings. The
inductance of solenoid will be proportional to :

Accepted Answer

$$\phi $$ = NBA = LI
N $$\mu $$
0
nI$$\pi $$R
2
= LI
$$N{\mu _0}{N \over l}l\pi {R^2} = LI$$
N and R constant
Self inductance (L) $$ \propto {1 \over l} \propto {1 \over {length}}$$

Answer

1/L2

Answer

1/L

Answer

L

Answer

L2

Electromagnetic Induction

The total number of turns and cross-section area in a solenoid is fixed. However, its length L is varied by adjusting the separation between windings. The inductance of solenoid will be proportional to :

Choose the correct answer: