AC CIRCUITS - Quiz

1) In which 3 phase system, the artificial neutral is required to measure the phase voltage?

3 wire star connected system 4 wire star connected system 3 wire delta connected system 4 wire delta connected system

2) What is the line voltage in 3 phase system if the phase voltage is 240V?

380 Volt 400 Volt 415 Volt 440 Volt

3) What is the power factor if one of the wattmeter gives negative reading in two wattmeter method of 3 phase power measurement?

0 0.5 Unity Less than 0.5

4) What is the phase displacement between phases in a 3-phase circuit?

90 Degree 120 Degree 180 Degree 360 Degree

5) Which condition is called as resonance RLC circuit?

X<sub>L</sub> > X<sub>C</sub> X<sub>C</sub> > X<sub>L</sub> X<sub>L</sub> = X<sub>C</sub> R < X<sub>L</sub>