Phase margin of a system is used to specify which of the following ?

Related Mcqs:

1. Which of the following statements is correct for a system with gain margin close to unity or a phase margin close to zero ?

   A. The system is relatively stable B. The system is highly stable C. The system is highly oscillatory D. None of the above...

2. Which of the following is the voltage for single phase A.C. system ?

   A. 22 V B. 440 V C. 5 kV D. 15 kV E. None of the above...

3. For three-phase induction motors which of the following is the least efficient method of speed control ?

   A. Cascade control B. Pole changing C. Rheostat control D. Combination of cascade and pole changing...

4. Which of the following methods is used to control speed of 25 kV, 50 Hz single phase traction ?

   A. Reduced current method B. Tap changing control of transformer C. Series parallel operation of motors D. All of the above...

5. A phase lag lead network introduces in the output_______________?

   A. lag at all frequencies B. lag at high frequencies and lead at low frequencies C. lag at low frequencies and lead at high frequencies D. none of the above...

6. The phase lag produced by transportation relays_____________?

   A. is independent of frequency B. is inverseh’proportional to frequency C. increases linearly with frequency D. decreases linearly with frequency...

7. For 25 kV single phase system power supply frequency is_______________?

   A. 60 Hz B. 50 Hz C. 25 Hz D. 16 Hz...

8. _________________method of starting a three phase induction motor needs six terminals ?

   A. Star-delta B. Resistance starting C. Auto-transformer D. None of the above...

9. In ________________ method of staging three phase induction motors the starting voltage is not reduced?

   A. auto-transformer B. star-delta C. slip ring D. any of the above...

10. In a CE amplifier, the phase difference between voltage across collector load RC and signal voltage is _________________?

    A. 180o B. 270o C. 90o D. 0o...