railway RRB JE (CBT I + CBT II) Mock Test 2024 Electrical and Electronics Measurements Measurement of Power Measurement of Poly Phase Power
In the measurement of 3 phase power by two watt meter method, for an unbalanced load, the power factor of the load is
1
\(\cos\left[\tan^{-1}\left\{\sqrt{3}\dfrac{(W_2-W_1)}{W_2+W_1}\right\}\right]\)
2
\(\cos\left[\tan^{-1}\left\{\dfrac{W_2-W_1}{W_2+W_1}\right\}\right]\)
3
cos (W2 - W1)
4
None of the above