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Power Station Alternators

A power station alternator (a.c. generator) is made of 3 sets of stationary coils (stator) at 120° to each other and a rotor - an electromagnet that spins in the middle of the coil. The electromagnet is connected to a d.c. supply and induces an alternating e.m.f. in each of the coils. The three e.m.fs are out of phase with each other by 120°.

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Specification: AQA Physics (7408), A-level, 3.7.5.4 Electromagnetic induction and 3.7.5.3 Magnetic flux and flux linkage. Topic: Electromagnetic Induction.

Key terms in this lesson

Nuclear fission
The splitting of a large, unstable nucleus into two smaller nuclei, plus neutrons, releasing energy because the products are more tightly bound than the original nucleus.

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