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

Related Mcqs:

1. In a pure capacitive 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 at high
   D. be reduced to one fourth

2. 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

3. A parallel AC. circuit in resonance will__________?

   A. have a high voltage developed across each inductive and capacitive section
   B. have a high impedance
   C. act like a resistor of low value
   D. have current in each section equal to the line current

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___________?

   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°

6. 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

7. 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

8. An A.C. voltage is impressed across a pure resistance of 3.5 ohms in parallel with a pure inductance of impedance of 3.5 ohms?

   A. the current through the resistance is more
   B. the current through the resistance is less
   C. both resistance and inductance carry equal currents
   D. none of the above

9. A sine wave has a frequency of 50 Hz. Its angular frequency is ________ radian/second.

   A. 100 n
   B. 50 jt
   C. 25 JT
   D. 5 n

10. A pure inductance connected across 250 V, 50 Hz supply consumes 100 W. This consumption can be attributed to_________?

    A. the big size of the inductor
    B. the reactance of the inductor
    C. the current flowing in the inductor
    D. the statement given is false