In an A.C. circuit power is dissipated in____________?

Related Mcqs:

1. The apparent power drawn by an A.C. circuit is 10 kVA and active power is 8 kW. The reactive power in the circuit is_________?

   A. 4 kVAR
   B. 6 kVAR
   C. 8 kVAR
   D. 16 kVAR

2. The input of an A.C. circuit having power factor of 0.8 lagging is 40 kVA The power drawn by the circuit is__________?

   A. 12 kW
   B. 22 kW
   C. 32 kW
   D. 64 kW

3. Power factor of an inductive circuit is usually improved by connecting capacitor to it in____________?

   A. parallel
   B. series
   C. either A. or (b)
   D. none of the above

4. In a circuit containing R, L and C, power loss can take place in____________?

   A. C only
   B. L only
   C. R only
   D. all above

5. In a series resonant circuit, the impedance of the circuit is___________?

   A. minimum
   B. maximum
   C. zero
   D. none of the above

6. All the rules and laws of D.C. circuit also apply to A.C. circuit containing_____________?

   A. capacitance only
   B. inductance only
   C. resistance only
   D. all above

7. If resistance is 20 Q. and inductance is 27 in a R-L series circuit, then time constant of this circuit will be________?

   A. 0.001 s
   B. 0.1 s
   C. 10 s
   D. 100 s

8. Which of the following circuit component opposes the change in the circuit voltage ?

   A. Inductance
   B. Capacitance
   C. Conductance
   D. Resistance

9. Power factor of an electrical circuit is equal to____________?

   A. R/Z
   B. cosine of phase angle difference be-tween current and voltage
   C. kW/kVA
   D. ratio of useful current to total cur¬rent Iw/I
   E. all of these

10. Pure inductive circuit takes power from the A.C. line when_________?

    A. applied voltage decreases but current increases
    B. applied voltage increases but current decreases
    C. both applied voltage and current increase
    D. both applied voltage and current decrease