Electrical Engineering Quiz 42

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Electrical Engineering Quiz 42

1 / 50

The power factor of a single phase load can be calculated if the instruments available are_____________?

2 / 50

Which of the following statements is incorrect ?

3 / 50

To reduce short circuit fault currents are used_____________?

4 / 50

If Q of an LC circuit increases, then bandwidth ______________?

5 / 50

Fault diverters are basically____________?

6 / 50

A thermistor has_____________?

7 / 50

In majority of instruments damping is provided by______________?

8 / 50

Which of the following is an advantage of eddy current heating ?

9 / 50

The maximum output voltage of a certain low-pass filter is 15 V. The output voltage at the critical frequency is_____________?

10 / 50

If excitation of a synchronous motor running with a constant load is decreased from its normal value, ignoring effects of armature reaction, it leads to____________?

11 / 50

A non inverting closed loop op amp circuit generally has a gain factor______________?

12 / 50

electromagnets generally function as holding magnets ?

13 / 50

The effect of error damping is to______________?

14 / 50

If the area of hysteresis loop of a material is large, the hysteresis loss in this material will be____________?

15 / 50

Which material is used to made a solar cell_______________?

16 / 50

An A.C. voltage is impressed across a pure resistance of 3.5 ohms in parallel with a pure inductance of impedance of 3.5 ohms?

17 / 50

The purpose of a parallel circuit resonance is to magnify________?

18 / 50

Which of the following capacitors will have the least variation ____________?

19 / 50

The torque produced in induction type relay (shaded pole structure) is_____________?

20 / 50

Which of the following method of speed control of D.C. machine will offer minimum efficiency ?

21 / 50

The carrier which are commonly used in constant ? frequency PWM is______________?

22 / 50

In a p-n junction diode under reverse bias , the magnitude of electric field is maximum at_____________?

23 / 50

The skin effect of a conductor will reduce as the__________?

24 / 50

In the operation and control of both naturally commutated and forced commutated SCR base converter, commutation plays an important role. The converters is / are ___________?

25 / 50

For a D.C. generator when the number of poles and the number of armature conductors is fixed, then which winding will give the higher e.m.f___________ ?

26 / 50

Which of the following refers to a parallel circuit ?

27 / 50

The steady state stability of the power system can be increased by_____________?

28 / 50

What is the advantage of HRC fuses over Rewirable fuses?

29 / 50

A capacitor charged to 200 V has 2000 (iC of charge. The value of capacitance will be_____________?

30 / 50

A 50 kW carrier is to be amplitude modulated to a level of 85%. What is the carrier power after modulation ?

31 / 50

Which of the following can have negative temperature coefficient _____________?

32 / 50

The output impedance of a transistor connected in_____________arrangement is the highest?

33 / 50

When the equivalent circuit diagram of doouble squirrel-cage induction motor is constructed the two cages can be considered__________?

34 / 50

The number of independent equations to solve a network is equal to_____________?

35 / 50

How many coulombs of charge flow through a circuit carrying a current of 10 A in 1 minute?

36 / 50

Bidirectional semiconductor device is___________?

37 / 50

In an electric room heat convector the method of heating used is______________?

38 / 50

Which of the following is incorrect ?

39 / 50

The torque developed by a 3-phase induction motor least depends on__________?

40 / 50

An audio amplifier is an example of _________________?

41 / 50

If a particular application needs high speed and high starting torque, then which of the following motor will be preferred ?

42 / 50

Time constant of an inductive circuit_________?

43 / 50

Time constant of a capacitive circuit__________?

44 / 50

An air gap is usually inserted in magnetic circuits to____________?

45 / 50

An increase in gain, in most systems, leads to_____________?

46 / 50

A resistance having rating 10 ohms, 10 W is likely to be a__________?

47 / 50

The value of a of a transistor is_____________?

48 / 50

During the commutation period in 3 phase converter, overlap time is_____________?

49 / 50

Whether circuit may be AC or one, following is most effective in reducing the magnitude of the current?

50 / 50

At series resonance, voltage across L is____________voltage across C?

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