The ratio of tru epower to apparent power, is

The ratio of true power to apparent power, is

Power factor is defined as the ratio of true power to apparent power:- Give an expression for power factor.

Power factor is defined as the ratio of true power to apparent power:-Calculate average power it.The A.C circuit is purely inductive.

The ratio of output power to input power of an elecrtic device is called…….

The ratio of secondary to primary turns is 4:5. if power input is P, then the ratio of power output to power input is

The ratio of the pressure power to the absorption power of all substances for a particular wavelength is the same at given temperature. The ratio is known as

Assertion : Power factor ("True power")/("Apparent power") i.e.osphi=(VIcosphi)/(VI) Reason : Alternator works on the principle of mutual induction