In a R-L-C circuit_________?

Related Mcqs:

1. Time constant of an inductive circuit_________?

   A. increases with increase of inductance and decrease of resistance
   B. increases with the increase of inductance and the increase of resistance
   C. increases with the decrease of inductance and decrease of resistance
   D. increases with decrease of inductance and increase of resistance

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

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

3. The reactance offered by a capacitor to alternating current of frequency 50 Hz is 20 Q. If frequency is increased to 100 Hz, reactance becomes_______ohms?

   A. 2.5
   B. 5
   C. 10
   D. 15

4. The r.m.s. value of a sinusoidal A.C. current is equal to its value at an angle of_______degrees?

   A. 90
   B. 60
   C. 45
   D. 30

5. In a loss-free R-L-C circuit the transient current is__________?

   A. oscillating
   B. square wave
   C. sinusoidal
   D. non-oscillating

6. The transient currents are associated with the____________?

   A. changes in the stored energy in the inductors and capacitors
   B. impedance of the circuit
   C. applied voltage to the circuit
   D. resistance of the circuit

7. The power factor of a D.C. circuit is always__________?

   A. less than unity
   B. unity
   C. greater than unity
   D. zero

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

   A. resistance only
   B. inductance only
   C. capacitance only
   D. none of the above

9. Capacitive susceptance is a measure of__________?

   A. reactive power in a circuit
   B. the extent of neutralisation of reactive power in a circuit
   C. a purely capacitive circuit’s ability to pass current
   D. a purely capacitive circuit’s ability to resist the flow of current

10. In an AC. circuit, a low value of kVAR compared with kW indicates_________?

    A. low efficiency
    B. high power factor
    C. unity power factor
    D. maximum load current