Question 290: Electromagnetic Induction

Question

When a current of $$1 \mathrm{~A}$$ is passed through a coil of 100 turns, the flux associated with it is $$2.5 	imes 10^{-5} \mathrm{~Wb} /$$ turn. The self inductance of the coil in millihenry is

Accepted Answer

Given: $$N=100, I=1 \mathrm{~A}, \phi=2.5 	imes 10^{-5} \mathrm{~Wb} /$$ turn
Self-inductance of coil,
$$\begin{aligned}
\mathrm{L} & =\frac{\mathrm{N} \phi}{\mathrm{I}} \
	herefore \quad \mathrm{L} & =\frac{100 	imes 2.5 	imes 10^{-5}}{1}=2.5 	imes 10^{-3} \mathrm{H}=2.5 \mathrm{~mH}
\end{aligned}$$

Answer

40

Answer

25

Answer

4

Answer

2.5

Electromagnetic Induction

When a current of $1 \mathrm{~A} is passed through a coil of 100 turns, the flux associated with it is 2.5 \times 10^{-5} \mathrm{~Wb} /$ turn. The self inductance of the coil in millihenry is

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