Question 7 - MCQs from NCERT Exemplar - Chapter 13 Class 10 - Magnetic Effects of Electric Current

The essential difference between an AC generator and a DC generator is that:

(a) AC generator has an electro-magnet while a DC generator has permanent magnet.

(b) DC generator will generate a higher voltage.

(c) AC generator will generate a higher voltage.

(d) AC generator has slip rings while the DC generator has a commutator.

Answer:

AC generator has slip rings while the DC generator has a commutator

Explanation - An AC generator has two rings called slip rings. These full rings help in changing the direction of current, thus producing AC current

A DC generator has two half rings called commutator. These half rings help keep the direction of current same, thus producing DC current.