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Electrical Engineering Quiz 48

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Electrical Engineering Quiz 48

1 / 50

For the transmission of heat from one body to another__________?

2 / 50

The value of E within the field due to a point charge can be found with the help of___________?

3 / 50

Ferrites are materials

4 / 50

A rotory converter can also be run as a___________?

5 / 50

In a simple magnetic field the strength of magnet flux_______________?

6 / 50

The diameter of the rotor shaft for an electric motor depends on which of the following ?

7 / 50

In case of impulse steam turbine_____________?

8 / 50

Transformer coupling is generally employed when load resistance is______________?

9 / 50

In the circle diagram for induction motor, the diameter of the circle represents____________?

10 / 50

Sulphated cells are indicated by____________?

11 / 50

Conductance is reciprocal of____________?

12 / 50

The minimum dielectric stress in a cable is at_____________?

13 / 50

Which method can be used for absolute measurement of resistances _______________?

14 / 50

Paramagnetic materials have relative permeability________________?

15 / 50

It is advisable to avoid line-starting of induction motor and use starter because__________?

16 / 50

When the two coil sides forming a coil are spaced exactly one pole pitch apart they are said to be of_____________?

17 / 50

At a certain frequency, the output voltage of a filter is 6 V and the input is 12 V.the filter?s bandwidth is____________?

18 / 50

Due to which of the following reasons a synchronous motor fails to pull into synchronism after applying D.C. field current?

19 / 50

Induction cup relay is operated due to changes in________________?

20 / 50

An npn BJT has gm=38mA/v, c? =10?14 F, c? =10?13F and DC current gain ?0=90.For this transistor fT & f? are________?

21 / 50

In a certain low-pass filter, fc = 3.5 kHz.if the input voltage is a 6 V sine wave with a dc level of 10 V, what is the output voltage magnitude?

22 / 50

Method which is commonly applied for unloading the coal for small power plant is___________?

23 / 50

The bandwidth of a single stage amplifier is_____________that of a multistage amplifier?

24 / 50

When a rectangular voltage waveform is applied to a capacitor, then the current waveform is ______________?

25 / 50

Which of the following is unit of inductance ?

26 / 50

The purpose of a coupling capacitor in a transistor amplifier is to ___________________?

27 / 50

Which of following is normally ON device?

28 / 50

In an induction motor if air-gap is increased__________?

29 / 50

The power factor of a single-phase induction motor is usually?

30 / 50

If d.c. supply of 10 V is fed to a differentiating circuit, then output will be_______________?

31 / 50

For commutation in three phase PAC, normally balanced three phase voltages VR, VY and VB are connected to the three legs of the converter via______________?

32 / 50

Life of the batteries is in the following ascending order____________?

33 / 50

Conductivity is analogous to____________?

34 / 50

Armature reaction in a generator results in_____________?

35 / 50

Interruption of large currents by relay requires______________?

36 / 50

__________ will be least affected due to charge in supply voltage frequency.

37 / 50

The efficiency of an electrolytic rectifier is nearly____________?

38 / 50

In a capacitor the electric charge is stored in____________?

39 / 50

A Weston synchronoscope is a________________?

40 / 50

For forced draught system, the function of chimney is mainly_____________?

41 / 50

A transformer can have zero voltage regulation at______________?

42 / 50

Transformer coupling is used for__________amplification?

43 / 50

. If =0.98 ,Ico=6?A and I?=100?A for a transistor,then the value of Ic will be______?

44 / 50

In case of conductively compensated D.C. series motors, the compensating winding is provided______________?

45 / 50

A field line and an equipotential surface are____________?

46 / 50

The metallic spheres A and B of radii 2m and 4m respectively carry the same charge 4 x 10 8 If the spheres are connected by a copper wire_______________?

47 / 50

__________________can be extended to systems which are time-varying ?

48 / 50

If two sine waves of the same frequency have a phase difference of JT radians, then_______?

49 / 50

The purpose of stator winding in the compensated repulsion motor is to_____________?

50 / 50

The reverse recovery time of diode is trr = 3 μs and the rate off all of the diode current is di/dt = 30 A/μs. The storage charge current QRR is___________?

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