AC circuits MCQ with Answers

AC circuits MCQ with Answers

11) What is the power factor in a 3 phase power measurement of two wattmeters showing equal readings?

Answer is:

1

12) Calculate the power factor of coil having resistance of 24 Ohm, draws the current of 5A, at 240V/ 50HZ AC supply.

Answer is:

0.5

13) Calculate the power factor of R.L.C circuit having resistance (R) = 15 Ohm, resultant reactance (X) = 20W connected across 240V /50Hz AC supply?

Answer is:

0.6

14) Calculate the value admittance (Y) of the RLC parallel circuit connected across 240volts/50Hz AC supply and 8 Amp. Current is passed through it ?

Answer is:

0.033 Mho

15) How the low power factor (P.F) can be improved in AC circuits?

Answer is:

By connecting capacitors in parallel