Question

if the resistance in an ac circuit is 100 ohms and the impedance is 120 ohms whats tge circuits power factor

Answer 1

Power factor = 0.83

Step-by-step explanation:

The power factor is basically a measure of how efficiently power is being used.

• In case of purely resistive load, the power factor is 1.
• In case of purely inductive or capacitive load, the power factor is 0.
• In case of any combination of them the power factor is between 0 and 1.

Power factor can be calculated in many ways for example;

`PF = cos(\theta)`

Where θ is the angle between voltage and current. in case of resistive load, voltage and current are "in phase" and there is 0 phase difference between them therefore, PF is 1 since cos(0) is 1.

`PF = (P)/(S)`

Where P is real power or also known as true power with units of watts and S is the apparent power with units of Volt ampere VA.

`PF = (R)/(Z)`

Where R is the resistance and Z is the impedance.

`PF= (100)/(120)`

`PF = 0.83`

Therefore, a circuit having a resistance of 100 Ω and impedance of 120 Ω has a power factor of 0.83.