A technician builds two generators, X and Y, using identical coils and magnets. Both coils are turned at the same steady rate. The coil of X is connected to its external circuit through two slip rings. The coil of Y is connected to its external circuit through a split-ring commutator.
Which statement correctly describes the outputs of the two generators?
The output of X keeps one polarity and is constant in size; the output of Y keeps one polarity but varies in size.
The output of X reverses polarity every half-turn; the output of Y keeps one polarity but varies in size.
The output of X keeps one polarity but varies in size; the output of Y reverses polarity every half-turn.
The output of X reverses polarity every half-turn; the output of Y keeps one polarity and is constant in size.
96 exam-style questions on AQA GCSE Physics 7.3 Induced potential, transformers and the National Grid (HT only), covering 7.3.1 Induced potential (HT only), 7.3.2 Uses of the generator effect (HT only), 7.3.3 Microphones (HT only), and 7.3.4 Transformers (HT only). Each one has a worked solution and a mark scheme showing where the marks go.