Eduprobe
Question:
The essential difference between an AC generator and a DC generator is that:
DC generator will generate a higher voltage.
AC generator will generate a higher voltage.
AC generator has an electromagnet while a DC generator has permanent magnet.
AC generator has slip rings while DC generator has a commutator.
Solution:
The essential difference between an AC generator and a DC generator lies in how they convert mechanical energy into electrical energy. This difference is primarily due to the presence of a commutator in a DC generator and slip rings in an AC generator.
An AC generator uses slip rings to allow the rotating coil to continuously connect to the external circuit. As the coil rotates, the induced voltage changes direction (alternating current), resulting in an AC output.
A DC generator uses a commutator, which is a split ring that switches the connections to the external circuit at the point where the direction of the induced voltage reverses. This switching action converts the alternating current produced by the rotating coil into a unidirectional current (direct current), resulting in a DC output.
Therefore, the correct answer is that AC generator has slip rings while DC generator has a commutator. The other options regarding the type of magnet used or the voltage generated are not the primary defining differences.