The essential difference between an AC generator and a DC generator lies in the type of output they produce and the components used in their construction.
Option A: An AC generator has an electromagnet while a DC generator has a permanent magnet – This is incorrect. Both AC and DC generators can use either electromagnets or permanent magnets, depending on the design. The primary difference is not in the type of magnet used.
Option B: DC generator will generate a higher voltage – This is not necessarily true. The voltage generated by a generator depends on various factors, including the speed of rotation and the number of coils, not on whether it is AC or DC.
Option C: AC generator will generate a higher voltage – This is also not accurate. The voltage output depends on the design and specifications of the generator, but it does not mean that an AC generator inherently generates a higher voltage than a DC generator.
Option D: AC generator has slip rings while DC generator has a commutator – This is the correct answer. The main difference between an AC and a DC generator is that an AC generator uses slip rings to allow the alternating current to flow, whereas a DC generator uses a commutator to convert the alternating current produced into direct current.
Correct Answer: D. AC generator has slip rings while DC generator has commutator.
