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Electrical Engineering Quiz 29

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Electrical Engineering Quiz 29

1 / 50

A certain p-channel E-MOSFET has VGS(th) = -2V. If VGS= 0V, the drain current is ____________?

2 / 50

In a power or distribution transformer about 10 per cent end turns are heavily insulated__________?

3 / 50

If temperature changes, h parameters of a transistor ________________?

4 / 50

If the feedback resistor in Q15 (above question) is open, the voltage gain ____________?

5 / 50

Which of the following motors is preferred for boom hoist of a travelling crane ?

6 / 50

The short circuit in any winding of the transformer is the result of_______________?

7 / 50

With rise in temperature the resistance of semi-conductors_________________?

8 / 50

Why resistor is used in Snubber circuit_________________ ?

9 / 50

The transfer function is applicable to which of the following ?

10 / 50

The effect of electric shock on human body depends on which of the following?

11 / 50

When a dielectric slab is introduced in a parallel plate capacitor, the potential difference between plates will______________?

12 / 50

As the doping to a pure semiconductor increases, the bulk resistance of the semiconductor_______________?

13 / 50

Superposition theorem can be applied only to circuits having____________?

14 / 50

An alternator coupled to a __________ runs at slow speed, as compared to as compared to others.

15 / 50

IGBT combines the advantages of_____________?

16 / 50

The value of negative feedback fraction is always _______________?

17 / 50

In a capacitor start and run motors the function of the running capacitor in series with the auxiliary winding is to_______________?

18 / 50

Unipolar modulation is generally used in____________?

19 / 50

Which of the following is the most likely source of harmonics in a transformer ?

20 / 50

A MOSFET, for its conduction uses_____________?

21 / 50

Which of the following primary cells has the highest voltage___________ ?

22 / 50

Which of the following works on torque on the current carrying conductor placed in magnetic field ?

23 / 50

Positive logic in a logic circuit is one in which______________?

24 / 50

In a 15 V Zener diode , the breakdown mechanism will occur by ______________?

25 / 50

Which of the following is not a source of power?

26 / 50

For aluminium, as compared to copper, all the following factors have higher values except:

27 / 50

As compared to a 2-wire D.C. distributor, a 3-wire distributor with same maximum voltage to earth uses only__________________?

28 / 50

An e.m.f. of 16 volts is induced in a coil of inductance 4H. The rate of change of current must be______________?

29 / 50

Which of the following properties a damping oil must possess ?

30 / 50

In a circuit breaker the basic problem is to________________?

31 / 50

A battery of 6 cells will show a drop of _______ volts from fully charged state to fully discharged state

32 / 50

A 500 kW, 3-phase, 440 volts, 50 Hz, A.C. induction motor has a speed of 960 r.p.m. on full load. The machine has 6 poles. The slip of the machine will be__________?

33 / 50

Transformers with a capacity of up to __________ have a cooling radiator system with natural cooling?

34 / 50

Reheat factor in steam turbines depends on______________?

35 / 50

The design of electromagnets is based upon which of the following fundamental equations ?

36 / 50

Star-delta starting of motors is not possible in case of____________?

37 / 50

In case of steam engines the steam pressure is_______________?

38 / 50

The typical value of SCR for modern alternator is____________?

39 / 50

For which of the following equipment current rating is not necessary?

40 / 50

Which semiconductor device acts like a diode and two transistor?

41 / 50

N atural air coo ling is generally restricted for transformers up to__________?

42 / 50

A JFET is also called____________ transistor?

43 / 50

For VGS = 0 V, the drain current becomes constant when VDS exceeds ________________?

44 / 50

Kirchhoff s voltage law applies to circuits with____________?

45 / 50

If the doping level in a crystal diode is increased, the width of depletion layer_____________?

46 / 50

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

47 / 50

The pressure coil of a wattmeter should be connected on the supply side of the current coil when______________?

48 / 50

(1(10101)2 is_______________?

49 / 50

Load center in a power station is___________?

50 / 50

A synchronous motor will always stop when:______________?

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