Question

The self inductance of a long solenoid carrying current is independent of

• A. its length
• B. The current
• C. Its cross-sectional area
• D. Magnetic permeability of the core

Answer 1

Answer: (B)

The current

Answer 2

Self-Inductance of a solenoid is given by $L=\frac{\mu_{0} N^{2} A}{l}$ where, $N=$ number of turns in solenoid $l=$ length of the solenoid $A=$ area of one turn of solenoid. The self-inductance of solenoid does not depend on current passing through it.