Physics

State (i) two dis-similarities, and (ii) two similarities between a d.c. motor and an a.c. generator.

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(i) Dis-similarities between a d.c. motor and an a.c. generator are —

D.C. motor	A.C. generator
A d.c. motor is a device which converts the electrical energy into the mechanical energy.	A generator is a device which converts the mechanical energy into the electrical energy.
A d.c. motor works on the principle of force acting on a current carrying conductor placed in a magnetic field.	A generator works on the principle of electromagnetic induction.

(ii) Similarities between a d.c. motor and an a.c. generator are —

(i) Both in d.c. motor and an a.c. generator, a coil rotates in a magnetic field between the pole pieces of a powerful electromagnet.

(ii) Both in a d.c. motor and an a.c. generator, there is a transformation of energy from one form to the other form.

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