AC CIRCUITS - Quiz

1) What is the unit of susceptance?

Mho Ohm Henry Farad

2) What is the resistance of the inductive coil takes 5A current across 240V, 50Hz supply at 0.8 power factor?

48 Ohm 42.5 Ohm 38.4 Ohm 26.6 Ohm

3) How the resonance frequency (fr) can be increased in A.C series circuit?

Increasing the inductance value Reducing the capacitance value Increasing the capacitance value Increasing the value of resistance

4) What is the main cause for below 0.5 lagging power factor in 3 phase system?

Due to fluctuation of voltage True power due to resistive load Reactive power due to more inductive load Reactive power due to more capacitive load

5) What is the current in neutral conductor in 3 phase unbalanced load in star connected system?

No current will flow The algebraic sum of current in 3 phases The algebraic sum of current in 2 phases only Lesser than the lowest current in any one of the phases