Question

A long solenoid has $500$ turns, When a current of $2 A$ is passed through it, the resulting magnetic flux linked with each turn of the solenoid is $4 \times 10^{-3} Wb$, then self induction of the solenoid is

• A. $2.0$ henry
• B. $1.0$ henry
• C. $4.0$ henry
• D. $2.5$ henry

Answer 1

Answer: (B)

$\phi=500 \times 4 \times 10^{-3}=2 Wb$
$Li = N \phi$
$L =\frac{2}{2}=1 H$