Correct option is B
The formula for power is:
P=VIcosϕ
Where:
P= Power
V= Voltage
I= Current
ϕ= Phase angle between voltage and current
Solution:
If the power factor increases (approaching 1), the wattmeter reading increases because more power is being converted into useful work (real power). This happens because increases as the phase angle between voltage and current decreases.
If the power factor decreases (due to an increase in the phase angle), decreases, and the wattmeter reading becomes lower, even though voltage and current remain unchanged.
