Time constant of an inductive circuit___________?

Related Mcqs:

1. In a pure inductive circuit___________?

   A. the current is in phase with the voltage
   B. the current lags behind the voltage by 90°
   C. the current leads the voltage by 90°
   D. the current can lead or lag by 90°

2. 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

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. Pure inductive circuit____________?

   A. consumes some power on average
   B. does not take power at all from a line
   C. takes power from the line during some part of the cycle and then returns back to it during other part of the cycle
   D. none of the above

5. In a pure inductive circuit if the supply frequency is reduced to 1/2, the current will__________?

   A. be reduced by half
   B. be doubled
   C. be four times as high
   D. be reduced to one fourth

6. 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

7. In a purely inductive circuit__________?

   A. actual power is zero
   B. reactive power is zero
   C. apparent power is zero
   D. none of above is zero

8. The time constant of the capacitance circuit is defined as the time during which voltage________?

   A. falls to 36.8% of its final steady value
   B. rises to 38.6% of its final steady value
   C. rises to 63.2% of its final steady value
   D. none of the above

9. The time constant of a series R-C circuit is given by____________?

   A. R/C
   B. RC2
   C. RC
   D. R2C

10. Time constant of a capacitive circuit__________?

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