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  4. 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 × 10-3 Wb, then self induction of the solenoid is

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Q. 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

KCETKCET 2022Electromagnetic Induction

Solution:

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