What is self-induction?
Correct Answer: Self-induction is the phenomenon where a changing current in a coil induces an EMF in the same coil.
- Step 1: Understand that a coil is a wire wound in a loop or spiral.
- Step 2: Know that current is the flow of electric charge through the coil.
- Step 3: Realize that when the current in the coil changes (either increases or decreases), it creates a changing magnetic field around the coil.
- Step 4: Learn that this changing magnetic field can induce an electromotive force (EMF) in the same coil.
- Step 5: Understand that this induced EMF can oppose the change in current, which is a key principle of self-induction.
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