Question

If ‘N’ is the number of turns in a circular coil, the value of its self-inductance varies as

• A. N0
• B. N3
• C. N2
• D. N1

Answer 1

Answer: (C)

N2

Answer 2

The self-inductance, denoted by L, is given by:
L = $\frac {μ₀ * N² * A}{l}$
where:
μ₀ is the permeability of free space,
N is the number of turns in the coil,
A is the cross-sectional area of the coil,
and l is the length of the coil. From the equation,
We can see that the self-inductance (L) varies as the square of the number of turns (N²).
Therefore, the correct answer is (C) N².