Electric generators

Recall that a changing magnetic field induces a potential difference.
Explain the operation of a moving coil microphone.
Recall that induced current generates a field opposing the original change.
Explain the output of an alternator (a.c. generation) using induction concepts.
Explain the adaptation of an alternator to a dynamo (d.c. generation).
Explain the principle of mutual induction in transformers.
Describe the relationship between potential difference ratio and turns ratio in transformers.
Apply transformer equations for potential difference, turns ratio, and power: $V_p \times I_p = V_s \times I_s$

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