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Electrical Engineering Quiz 10

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Electrical Engineering Quiz 10

1 / 50

capacitors are used in transistor circuits?

2 / 50

In D.C. machines the usual limit of slot pitch is________________?

3 / 50

A sinusoidal voltage of 5 Hz is applied to the field of a shunt generator. The armature voltage wave will_____________?

4 / 50

The power loss is an important factor for the design of_______________?

5 / 50

The circuit that provides the best stabilization of operating point is___________________?

6 / 50

The area under a load curve gives__________?

7 / 50

The draught in locomotive boilers is produced by_____________?

8 / 50

In a lamp load when more than one lamp are switched on the total resistance of the load_____________?

9 / 50

The value of co-efficient of adhesion will be high when rails are_________________?

10 / 50

In order to get more voltage gain from a transistor amplifier, the transistor used should have_________________?

11 / 50

Which of the following statement is correct_______________?

12 / 50

A switchgear is device used for_____________?

13 / 50

Operating point represents__________________?

14 / 50

The conduction losses in IGBT is____________?

15 / 50

In capacitor start single-phase motors____________?

16 / 50

The diode detector in an AM radio receiver is usually found _____________?

17 / 50

To reverse the direction of rotation of acapacitor start motor while it is running we should___________?

18 / 50

Which of the following is not necessarily an advantage of interconnecting various power stations?

19 / 50

In D.C. motor which of the following can sustain the maximum temperature rise?

20 / 50

___________ is invariably used as base load plant.

21 / 50

Which of the following statements is correct ?

22 / 50

We use _____________ ICs in computers?

23 / 50

Addition of trivalent impurity to a semiconductor creates many_______________?

24 / 50

A pilot exciter is provided on generators for which of the following reasons?

25 / 50

The form factor is the ratio of_______?

26 / 50

The core of a coil has a length of 200 mm. The inductance of coil is 6 mH. If the core length is doubled, all other quantities, remaining the same, the inductance will be_____________?

27 / 50

Quadrilateral speed-time curve pertains to which of the following services ?

28 / 50

The equation of 50 Hz current sine wave having r.m.s. value of 60 A is____________?

29 / 50

In a D.C. generator the magnetic neutral axis coincides with the geometrical neutral axis, when_______________?

30 / 50

For both lap and wave windings, there are as many commutator bars as the number of_____________?

31 / 50

The principle on which vector voltmeter is based is_____________?

32 / 50

Armature reaction in dc motor results___________?

33 / 50

A synchronous condenser is virtually which of the following?

34 / 50

Differential amplifiers are used in______________?

35 / 50

The phenomenon of an uncharged body getting charged merely by the nearness of a charged body is known as____________?

36 / 50

The values of h parameter of a transistor in CE arrangement are ____________ arrangement?

37 / 50

If the crystal frequency changes with temperature, we say that crystal has___________temperature coefficient?

38 / 50

The current zero interruption, in oil and air blast circuit breakers, is achieved by_______________?

39 / 50

In a ceilingfan employing capacitor run motor____________?

40 / 50

By which of the following methods string efficiency can be improved?

41 / 50

Piezoelectric materials serve as a source of ____________ ?

42 / 50

The internal resistance of a 20,000 ohm/volt voltmeter set on its 5 V range is_____________?

43 / 50

As the load is applied to a synchronous motor, the motor takes more armature current because

44 / 50

The speed of a universal motor is usually reduced by using____________?

45 / 50

A field of force can exist only between_____________?

46 / 50

The approximate input impedance of the opamp circuit which has Ri=10k, Rf=100k, RL=10k?

47 / 50

Point out the wrong statement. Magnetic leakage is undesirable in electric machines because it___________?

48 / 50

At room temperature, an intrinsic silicon crystal acts approximately as_______________?

49 / 50

The arrow in the symbol of a transistor indicates the direction of____________?

50 / 50

Compensating windings are used in D.C. generators______________?

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