If a shunt motor is started with its field winding open then?

Related Mcqs:

1. If a shunt motor is started with its field winding open then___________?

   A. It will rotate at the same speed as that with its field winding closed
   B. It will rotate at less speed as that with its field winding closed
   C. It will rotate at dangerously high speed
   D. None of these

2. The sum of all phase current in a star connected primary winding with no neutral connection is equal to___________?

   A. Phase current
   B. Three times the phase current
   C. Three times the line current
   D. Zero at all times

3. With gate open, the maximum anode current at which SCR is turned off from ON condition is called____________?

   A. breakdown voltage
   B. peak reverse voltage
   C. holding current
   D. latching current

4. The ability of an electronic system to function properly in its intended electromagnetic environment and should not be a source of pollution to that electromagnetic environment is known as____________?

   A. Susceptibility
   B. Emission
   C. Interference
   D. Electromagnetic compatibility

5. A MOSFET, for its conduction uses_____________?

   A. Only minority carriers
   B. Only majority carriers
   C. Both minority and majority carriers
   D. None of these

6. A step up chopper has input voltage 110 V and output voltage 150 V. The value of duty cycle is_____?

   A. 0.32
   B. 0.67
   C. 0.45
   D. 0.27

7. After proper turn on of thyristor____________?

   A. gate signal is always present
   B. gate signal must be removed
   C. gate signal should present but can be removed
   D. none of the above.

8. During gate recovery time_____________?

   A. charge carriers of J2 junction recombined
   B. charge carriers of J2 junction is swept out
   C. charge carrier of J1 junction removed
   D. charge carriers of J3 junction is removed

9. Anode of an operational SCR is _______________?

   A. Always positive w.r.t cathode
   B. Always negative w.r.t anode
   C. Always positive w.r.t anode
   D. Always negative w.r.t cathode

10. Double edge modulation eliminates certain harmonics when the reference is a__________?

    A. Sine wave
    B. Square wave
    C. Triangular wave
    D. Trapezoidal wave