Give two differences between a d.c. motors and a.c. generator.

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Solution

D.C Motors A.C. Generators
(i) D.C. motor convert electrical energy into mechanical energy. (i) A.C. generator converts mechanical energy into electric energy.
(ii) In the d.c. motor split ring is divided into two halves. (ii) In a.c. generator two separate split rings are used.
(iii) D.C. motors are less efficient due to sparking and other losses. (iii) A.C. generators are very high efficient as the energy losses are less

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D.C Motors	A.C. Generators
(i) D.C. motor convert electrical energy into mechanical energy.	(i) A.C. generator converts mechanical energy into electric energy.
(ii) In the d.c. motor split ring is divided into two halves.	(ii) In a.c. generator two separate split rings are used.
(iii) D.C. motors are less efficient due to sparking and other losses.	(iii) A.C. generators are very high efficient as the energy losses are less