Question

The current in an inductor is increased uniformly from 0 to 10 A in 0.10 seconds. If the induced emf generated by the inductor is 2.0 V, what is its inductance? 0.0200 H It cannot be determined without knowing the number of turns, the length, and the cross sectional area. It cannot be determined without knowing the number of turns, the current, and the magnetic flux for that current. 200 H 50.0 H

Answer 1

emf generated by an inductor is given by, $\varepsilon = L \left |\frac{\mathrm{d} I}{\mathrm{d} t} \right |$

Indutance, $L = \varepsilon \frac{\mathrm{d} t}{\mathrm{d} I} = 2.0 * \frac{0.10}{10} = 0.0200 H$

Option A