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Electrical Engineering Quiz 31

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Electrical Engineering Quiz 31

1 / 50

In a JFET, IDSS is known as ________________?

2 / 50

Steel wire is used as____________?

3 / 50

No-load current in a transformer________________?

4 / 50

The value of emitter capacitor CE in a multistage amplifier is about____________?

5 / 50

If the power level of an amplifier reduces to half, the db gain will fall by___________?

6 / 50

Reheat factor is the ratio of_____________?

7 / 50

Copper, even though costly, finds use in the windings of electrical machines because_____________?

8 / 50

Silicon steel used in lamination?s mainly reduces___________?

9 / 50

Introducing a resistor in the emitter of a common amplifier stabilizes the dc operating point against variations in____________?

10 / 50

Dry cell is modification of____________?

11 / 50

Low power factor is usually not due to___________?

12 / 50

Digital ICs process______________?

13 / 50

In arc furnace the function of choke is______________?

14 / 50

Magnetism of a magnet can be destroyed by_____________?

15 / 50

Following D.C. generator will be in a position to build up without any residual magnetism in the poles______________?

16 / 50

Suri transmission is_________________?

17 / 50

In a regenerative feed heating cycle, the greatest economy is affected___________?

18 / 50

Depreciation charges are high in case of__________?

19 / 50

Shunt generators are most suited for stable parallel operation because of their______________?

20 / 50

A voltage divider consists of two 68 k? resistors and a 24 V source. The unknown output voltage is______________?

21 / 50

As load on an induction motor goes on increasing______________?

22 / 50

A signal other than the reference input that tends to affect the value of controlled variable is known as_________________?

23 / 50

Voltage commutation circuit can be converted into a current commutation by interchanging the positions of____________?

24 / 50

In a resistance furnace the atmosphere is_____________?

25 / 50

The rapid wear of brushes takes place due to____________?

26 / 50

Mains a.c. power is converrted into d.c. power for_________________?

27 / 50

The electric charge of 100 ?C is 13cm apart from another charge 16.9?C electric force between them is_____________?

28 / 50

The capacitance between two plates increases with____________?

29 / 50

In constant voltage charging method, the charging current from discharged to fully charged condition_____________?

30 / 50

When current feedback (negative) is applied to an amplifier, its input impedance _____________?

31 / 50

In the squirrel-cage induction motor the rotor slots are usually given slight skew__________?

32 / 50

A centrifugal switch is used to dis- connect ?starting winding when motor has___________?

33 / 50

Due to which of the following reasons the cables should not be operated too hot ?

34 / 50

The change of cross-sectional area of conductor in magnetic field will affect______________?

35 / 50

Which of the following devices is used for conversion of co-ordinates ?

36 / 50

H.R. fuses provide best protection against________________?

37 / 50

An SCR has three terminals viz ________________?

38 / 50

In an induction motor, no-load the slip is generally____________?

39 / 50

The time constant of the capacitance circuit is defined as the time during which voltage________?

40 / 50

In an induction motor the relationship between stator slots and rotor slots is that_____________?

41 / 50

In forward blocking mode of a thyristor________?

42 / 50

In _________ system fuel from a central pulverizing unit is delivered to a bunker and then to the various burners?

43 / 50

Annual depreciation of the plant it proportional to the earning capacity of the plant vide

44 / 50

The output power of the cascaded amplifier / attenuator system can be determined using___________?

45 / 50

A sinusoidal voltage with a peak-to-peak value of 18 V is applied to an RC low-pass filter. If the reactance at the input frequency is zero, the output voltage is____________?

46 / 50

An induction motor is__________?

47 / 50

In coal preparation plant, magnetic separators are used to remove___________?

48 / 50

The advantage of oil filled cables is_________?

49 / 50

The latching current of GTO should be of order

50 / 50

Mutually inductance between two magnetically-coupled coils depends on____________?

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