The question covers power factor of transformer, types of DC machine, working principle of AC alternator, and DC motors.

• Power factor of a transformer is the ratio of real power to apparent power.

• Types...read more

Ac alternators work on the principal of eltromagnetic induction to convert mechanical energy into electrical energy

AC generator is a machine that converts mechanical energy into electrical energy. The AC Generator’s input supply is mechanical energy supplied by steam turbines, gas turbines and combustion engines. ...read more

1.means to assess the insulation of a transformer 2.DC generator as well as DC motor3.principle of electromagnetic induction 4.motor that turns energy from a direct current and turns this into mechani...read more

Working principle of ac alternator

0.85 to 1 . DC Generator and DC motor . Faradays Law of Electromagnetic Induction.

1.Pf of transformer is 0.75. to 0.80

2.shunt wound , series wound ,seprately exited machine, compound machine , self exited motore

3.alternator converts electricity from mechanical

Energy, electromagn...read more