Chapter 65 of 2364 min read

Self and mutual inductance

Why this is asked: Self-inductance is fixed by a coil's geometry and turns alone, never by the current through it — what an inductor actually opposes is a change in current, not current itself, so a steady current flows through it perfectly freely.

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Test yourself

•AB is a part of an electrical circuit (see figure). The potential difference $V_{A} - V_{B}$ , at the instant when the current $i = 2$ A and is increasing at a rate of 1 A/s, is:

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