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Electrical Engineering Quiz 14

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Electrical Engineering Quiz 14

1 / 50

The purpose of resistance in the emitter circuit of a transistor amplifier is to _________________?

2 / 50

Equivalent capacitance is greater than individual capacitances in_____________?

3 / 50

The fuse wire, in D.C. circuits, is inserted in____________?

4 / 50

In a stable control system backlash can cause which of the following ?

5 / 50

Different generating stations use following prime movers?

6 / 50

An over excited synchronous motor is used for____________?

7 / 50

A.C and D.C have the same______________?

8 / 50

Which of the following power plant has highest Depreciation charges?

9 / 50

The fuse blows off by___________?

10 / 50

The input current waveform of a bridge controlled rectifier when the load is perfectly filtered is___________?

11 / 50

In normal operation of an SCR, gate is _____________w.r.t. cathode?

12 / 50

The output current in PWM DC ? DC converters is equal to___________?

13 / 50

In a magnetic material hysteresis loss takes place primarily due to___________?

14 / 50

A low utilization factor for a plant indicates that

15 / 50

Ward Leonard method of speed control is basically a______________?

16 / 50

In an A.C. circuit power is dissipated in____________?

17 / 50

When an alternating current passes through an ohmic resistance the electrical power converted into heat is__________?

18 / 50

A crack in the magnetic path of an inductor will result in________________?

19 / 50

Cell short circuit results in_________?

20 / 50

The purpose of providing dummy coils in a generator is__________________?

21 / 50

jCorona usually occurs when the electrostatic stress in air around the conductor exceeds?

22 / 50

To determine the polarity of the voltage drop across a resistor, it is necessary to know___________?

23 / 50

In case of _______________ speed control by injecting e.m.f. in the rotor circuit is possible?

24 / 50

Mercury cell has which of the following characteristics ____________?

25 / 50

The differential voltage gain of a differential amplifier is equal to RC divided by _______________?

26 / 50

By which of the following methods major portion of the heat generated in a H.R. fuse is dissipated ?

27 / 50

Level of electrolyte in a cell should be ________ the level of plates

28 / 50

The random motion of holes and free electrons due to thermal agitation is called______________?

29 / 50

As the temperature of a transistor goes up, the base-emitter resistance___________?

30 / 50

The wheels of a train, engine as well as bogies, are slightly tapered to_____________?

31 / 50

For the same secondary voltage, the output voltage from a centre-tap rectifier is___________ than that of bridge rectifier?

32 / 50

The output of a microphone is rated at -52 db. The reference level is 1V under specified conditions. What is the output voltage of this microphone under the same sound conditions?

33 / 50

The unit of flux is the same as that of_______________?

34 / 50

The insulating material for a cable should have__________?

35 / 50

The net armature voltage of a synchronous motor is equal to the_______________?

36 / 50

The ideal OP-AMP has the following characteristics

37 / 50

Helical coils can be used on___________________?

38 / 50

For a sine wave with peak value Imax the r.m.s. value is_______?

39 / 50

How does the magnetic compass needle behave in a magnetic field ?

40 / 50

An ammeter has an internal resistance of 50 ?. The meter movement itself can handle up to 1 m If 10 mA is applied to the meter, the shunt resistor, RSH1, is approximately___________?

41 / 50

The current flowing through an unloaded voltage divider is called the____________?

42 / 50

Standard resistor is made from_________________?

43 / 50

If a copper disc is rotated rapidly below a freely suspended magnetic needle, the magnetic needle shall start rotating with a velocity?

44 / 50

The draught produced by steel chimney as compared to that produced by brick chimney for the same height is_____________?

45 / 50

A CE amplifier is also called _______________ circuit?

46 / 50

The letters AVC stand for ________________?

47 / 50

Series capacitors on transmission lines are of little use when the load VAR requirement is___________?

48 / 50

Transformer works on the principle of________________?

49 / 50

When the lead-acid cell is fully charged, the electrolyte assumes _______ appearance

50 / 50

Which of the following statements is not necessarily correct for open control system ?

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