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Electrical Engineering Quiz 4

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Electrical Engineering Quiz 4

1 / 50

The purpose of emitter capacitor (i.e. capacitor across RE) is to ______________?

2 / 50

A JFET has three terminals, namely________________?

3 / 50

The square wave operation of 3 phase VSI lines contains the harmonics. The amplitudes are____________?

4 / 50

A reverse bias pn junction has_____________?

5 / 50

Short circuit test on transformers is conducted to determine____________?

6 / 50

In a domestic cake baking oven the temperature is controlled by________________?

7 / 50

At a certain frequency, the output voltage of a filter is 6 V and the input is 12 V. The voltage ratio in decibels is_____________?

8 / 50

In a mercury arc rectifier positive ions are attracted towards______________?

9 / 50

The efficiency of the copper oxide rectifier seldom exceeds____________?

10 / 50

Which of the following devices are commonly used as error detectors in instruments ?

11 / 50

In which of the following applications the load on motor changes in cyclic order ?

12 / 50

If an inductance is connected in one arm of bridge and resistances in the remaining three arms____________?

13 / 50

In the transformer following winding has got more cross-sectional area______________?

14 / 50

In heating the ferromagnetic material by induction heating, heat is produced due to_____________?

15 / 50

An important limitation of a crystal oscillator is____________?

16 / 50

Salvage value of the plant is always____________?

17 / 50

A __________ device prevents the oscillation of the moving system and enables the latter to reach its final position quickly___________?

18 / 50

Electrolyte used in a lead-acid cell is__________?

19 / 50

A thyristor can termed as__________?

20 / 50

In an Anderson bridge, the unknown inductance is measured in terms of_______________?

21 / 50

Kirchhoffs current law is applicable to only

22 / 50

In ac ? dc conversion, when the switch is closed then the sum of voltages around the loop is____________?

23 / 50

The operation of a D.C. machine with large air gap lengths is comparatively_____________?

24 / 50

The density of hydrogen is __________ times the density of air?

25 / 50

For measurement of mutual inductance we can use________________?

26 / 50

Which of the following materials is not used for transmission and distribution of electrical power________________?

27 / 50

The direction of rotation of a D.C. series motor can be changed by___________?

28 / 50

Fleming?s left hand rule is used to find_________________?

29 / 50

Transmission voltage of 11 kV is normally used for distances up to_____km?

30 / 50

Zener diode can be used as__________________?

31 / 50

The total resistance of a parallel circuit is 50 ?. If the total current is 120 mA, the current through the 270 ? that makes up part of the parallel circuit is approximately_______________?

32 / 50

A load curve indicates___________?

33 / 50

Which of the following is measured by using a vector voltmeter ?

34 / 50

Hysteresis is desirable in Schmitt-trigger, because______________?

35 / 50

A 1,000 V power supply would use_____________ as a filter capacitor?

36 / 50

_________________cannot be fabricated on an IC?

37 / 50

The value of exciting or magnetizing current depends upon which of the following factors ?

38 / 50

Pressure error can be measured by which of the following ?

39 / 50

A synchronous motor can operate at____________?

40 / 50

The most commonly used transistor arrangement is____________arrangement?

41 / 50

For large power transformers, self oil cooled type or air blast type which of the following values of current density may be used?

42 / 50

Magnetic circuit breaker has ___________ trip action

43 / 50

Empire tape is__________?

44 / 50

Resistance grounding is used for voltage between_________________?

45 / 50

The speed of a synchronous motor:

46 / 50

Machines cooled by direct cooling method may be called_____________?

47 / 50

A linear resistor having 0 < R < ?o is a______________?

48 / 50

With zero volts on both inputs, an OP-amp ideally should have an output _______________?

49 / 50

Transformer breaths in when_______________?

50 / 50

When 4 volts e.m.f. is applied across a 1 farad capacitor, it will store energy of_____________?

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