railway RRB JE (CBT I + CBT II) Mock Test 2024 Electrical and Electronics Measurements Measurement of Power
For balanced lagging power factor, according to two wattmeter method,
W1 = VL IL cos (30 - ϕ)
W2 = VL IL cos (30 + ϕ)
The total reactive volt-amperes Q is given by
1
Q = 0
2
Q = \(\sqrt 3 {V_L}{I_L}\sin \phi\)
3
Q = 1
4
Q = VLILsin ϕ