Published by:
CGP EDU Academic Team
Published on: September 12, 2026
The self-inductance of a solenoid of length 
, area of cross-section 
and having 
turns is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
The self-inductance of a solenoid is given by the formula:
L = \frac{\mu_0 N^2 A}{L}
where:
- L is the self-inductance
- \mu_0 is the permeability of free space (a constant)
- N is the number of turns
- A is the area of cross-section
- l is the length of the solenoid
By analyzing the options provided and substituting relevant values, we find that the correct expression for self-inductance matches option D.
Therefore, the answer is D.
L = \frac{\mu_0 N^2 A}{L}
where:
- L is the self-inductance
- \mu_0 is the permeability of free space (a constant)
- N is the number of turns
- A is the area of cross-section
- l is the length of the solenoid
By analyzing the options provided and substituting relevant values, we find that the correct expression for self-inductance matches option D.
Therefore, the answer is D.
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