GCSE Standard Questions: The Generator

(Electromagnetic Induction)

Q3. The diagram below shows a generator. When the coil is rotated around the axle, a current is produced and the lamp lights up.

(a) Explain the purpose of the slip rings and brushes.

(2 marks)

(b) Explain how this generator gives an a.c. rather than a d.c. output.

(2 marks)

(c) In this design, the generator effect occurs because the coil rotates in a magnetic field. How else can a generator effect occur?

(1 mark)

(Total 5 marks)