Question

The current in a generator armature is AC because

• A. The magnetic field reverses at intervals
• B. The current in the field coils is AC
• C. The rotation of the armature causes the field through it to reverse after every half cycle
• D. The commutator feeds current into it in opposite directions every half cycle.

Answer 1

The correct option is C The rotation of the armature causes the field through it to reverse after every half cycle

In an electric generator, after every half rotation, the direction of e.m.f reverses and hence the current changes its direction after a regular interval.