Electrical Engineering Quiz 42
1 / 50
Time constant of a capacitive circuit__________?
2 / 50
An audio amplifier is an example of _________________?
3 / 50
The power factor of a single phase load can be calculated if the instruments available are_____________?
4 / 50
When the equivalent circuit diagram of doouble squirrel-cage induction motor is constructed the two cages can be considered__________?
5 / 50
Which of the following is incorrect ?
6 / 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___________ ?
7 / 50
The purpose of a parallel circuit resonance is to magnify________?
8 / 50
If Q of an LC circuit increases, then bandwidth ______________?
9 / 50
A non inverting closed loop op amp circuit generally has a gain factor______________?
10 / 50
Which of the following refers to a parallel circuit ?
11 / 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?
12 / 50
The carrier which are commonly used in constant ? frequency PWM is______________?
13 / 50
The maximum output voltage of a certain low-pass filter is 15 V. The output voltage at the critical frequency is_____________?
14 / 50
The value of a of a transistor is_____________?
15 / 50
If a particular application needs high speed and high starting torque, then which of the following motor will be preferred ?
16 / 50
How many coulombs of charge flow through a circuit carrying a current of 10 A in 1 minute?
17 / 50
The torque produced in induction type relay (shaded pole structure) is_____________?
18 / 50
To reduce short circuit fault currents are used_____________?
19 / 50
In majority of instruments damping is provided by______________?
20 / 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 ___________?
21 / 50
At series resonance, voltage across L is____________voltage across C?
22 / 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____________?
23 / 50
Bidirectional semiconductor device is___________?
24 / 50
electromagnets generally function as holding magnets ?
25 / 50
Which of the following method of speed control of D.C. machine will offer minimum efficiency ?
26 / 50
During the commutation period in 3 phase converter, overlap time is_____________?
27 / 50
What is the advantage of HRC fuses over Rewirable fuses?
28 / 50
Which of the following statements is incorrect ?
29 / 50
A capacitor charged to 200 V has 2000 (iC of charge. The value of capacitance will be_____________?
30 / 50
The torque developed by a 3-phase induction motor least depends on__________?
31 / 50
The steady state stability of the power system can be increased by_____________?
32 / 50
In an electric room heat convector the method of heating used is______________?
33 / 50
Which of the following is an advantage of eddy current heating ?
34 / 50
An air gap is usually inserted in magnetic circuits to____________?
35 / 50
Whether circuit may be AC or one, following is most effective in reducing the magnitude of the current?
36 / 50
A thermistor has_____________?
37 / 50
Which of the following can have negative temperature coefficient _____________?
38 / 50
If the area of hysteresis loop of a material is large, the hysteresis loss in this material will be____________?
39 / 50
Which material is used to made a solar cell_______________?
40 / 50
Fault diverters are basically____________?
41 / 50
The output impedance of a transistor connected in_____________arrangement is the highest?
42 / 50
The skin effect of a conductor will reduce as the__________?
43 / 50
In a p-n junction diode under reverse bias , the magnitude of electric field is maximum at_____________?
44 / 50
A resistance having rating 10 ohms, 10 W is likely to be a__________?
45 / 50
Time constant of an inductive circuit_________?
46 / 50
An increase in gain, in most systems, leads to_____________?
47 / 50
A 50 kW carrier is to be amplitude modulated to a level of 85%. What is the carrier power after modulation ?
48 / 50
The effect of error damping is to______________?
49 / 50
The number of independent equations to solve a network is equal to_____________?
50 / 50
Which of the following capacitors will have the least variation ____________?
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