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Self Induction

A plot of mag...

Question

A plot of magnetic flux $(ϕ)$ versus current (I) is shown in the figure, for two inductors A and B. Which of the two has the larger value of self-inductance?

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Solution

Self inductance $L = \frac{ϕ}{I}$
Thus, slope of $ϕ - I$ graph gives the value of self inductance. More is the slope, more is the self inductance. Since, line A has more slope, thus inductor A has larger self inductance.

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