Question

State whether true or false:
The power factor (PF) indicates how much of the apparent power is true power.
A. True
B. False

Answer 1

Hint:First study and understand what is meant by power factor. Power factor is used to determine the power consumed in an AC (alternating current) circuit. It is equal to the ratio of the real power consumed by the circuit to the apparent power given to the circuit.

Complete answer:
Let us first understand what is meant by power factor. Power factor is a term used in the case of an AC circuit. Power factor is defined as the ratio of real power utilized by the load (P) to the apparent (or total) power given to the circuit (S). In other words, if we supply an apparent power (P) in a given Ac circuit then it will consume some part of the power (P), say (Q) and dissipate the power Q in form of heat.

In this case, the power factor of the circuit is $PF=\dfrac{Q}{P}$. Therefore, we can say that power factor helps us to determine how real power out of the apparent power given is consumed by the circuit. Hence, we can also say that the power factor (PF) indicates how much of the apparent power is true power.

This means the given statement is true and the correct option is A.

Note:Since power factor is a ratio, it is a dimensionless quantity.It is an important factor of AC circuits. Power factor is an indication of the relative phase of the power line voltage and the power line current. It has values ranging from 0 to 1. A PF of 1 indicates that the voltage and current are in phase and a PF of 0 indicates that the voltage and current are 90 degrees out of phase.