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
• E. the number of turns

Answer 1

The correct option is B the current

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.