1.

The potential differences across the resistance, capacitance and inductance are 80 V, 40 V and 100 V respectively in an L-C-R circuit. The power factor of this circuit is

Answer»

0.8
`1.0`
0.4
0.5

Solution :TAN `PHI=(V_L-V_C)/V_R`
`=(100-40)/80`
`=60/80=3/4`
From FIGURE, power FACTOR = cos `phi`
`=4/5`= 0.8


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