Electrical Engineering Quiz 44
1 / 50
The current drawn by the armature of D.C. motor is directly proportional to__________?
2 / 50
Regenerative feedback implies feedback with_______________?
3 / 50
The changes in volume of transformer cooling oil due to variation of atmospheric temperature during day and night is taken care of by which part of transformer?
4 / 50
In an automatic control system which of the following elements is not used ?
5 / 50
In the differential voltage gain & the common mode voltage gain of a differential amplifier are 48db &2db respectively, then its common mode rejection ratio is__________?
6 / 50
The ideal load factor should be_____________?
7 / 50
If a third equal and similar charge is placed between two equal and similar charges, then this third charge will_____________?
8 / 50
The effective channel length of a MOSFET in a saturation decreases with increase in___________?
9 / 50
Which of the following is a ferromagnetic material ?
10 / 50
Minimum voltage regulation occurs when the power factor of the load is_____________?
11 / 50
An induction motor has relatively high power factor at__________?
12 / 50
In a series L-C circuit at the resonant frequency the__________?
13 / 50
The total deficiency or excess of electrons in a body is known as____________?
14 / 50
The path of a magnetic flux in a transformer should have______________?
15 / 50
Which of the following materials is used for making coils of standard resistances ?
16 / 50
A pure capacitor connected across an A.C. voltage consumed 50 W. This is due to________?
17 / 50
Gate circuit or triggering circuit of a thyristor is
18 / 50
The closed-loop voltage gain of an inverting amplifier equal to______________?
19 / 50
Direct conversion of heat into electric power is possible through__________?
20 / 50
When the transistor (CE arrangement) is in the cut off region, the collector current is ______________?
21 / 50
The base resistor method is generally used in ________________?
22 / 50
A car is raining at a constant speed of 50 km/h, which of the following is the feedback element for the driver ?
23 / 50
In an unregulated power supply, if input a.c. voltage increases, the output voltage _______________?
24 / 50
When drain voltage equals the pinch-off-voltage, then drain current ___________ with the increase in drain voltage?
25 / 50
If gate current is increased, then anode-cathode voltage at which SCR closes_________________?
26 / 50
The magnitude of the induced e.m.f. in a conductor depends on the______________?
27 / 50
Spark plug makes use of which of the following materials for insulation ?
28 / 50
A dynamometer wattmeter can be used for______________?
29 / 50
The output transformer used in a power amplifier is a _____________ transformer?
30 / 50
Heat is transferred simultaneously by condition, convection and radiation_____________?
31 / 50
Voltage applied across a ceramic dielectric produces an electrolytic field 100 times greater than air. What will be the value of dielectric constant ________?
32 / 50
For the parallel operation of two or more D.C. compound generators, we should ensure that_______________?
33 / 50
If variable part of annual cost on account of interest and depreciation on the capital outlay is equal to the annual cost of electrical energy wasted in the conductors, the total annual cost will be minimum and the corresponding size of conductor will be most economical. This statement is known as___________________?
34 / 50
If a single phase induction motor runs slower than normal, the most likely defect is_____________?
35 / 50
In an AM wave useful power is carrier by ______________?
36 / 50
Which of the followings is/are active element?
37 / 50
The switch board instruments________________?
38 / 50
A Zener diode______________?
39 / 50
The force per unit charge is know as__________________?
40 / 50
The push-pull circuit must use ______________ operation?
41 / 50
Emitter follower is used for ________________?
42 / 50
Calculate the cutoff frequency of a first-order low-pass filter for R1 = 2.5k? and C1 = 0.05?F___________?
43 / 50
An RL low-pass filter consists of a 5.6 mH coil and a 3.3 k? resistor. The output voltage is taken across the resistor. The circuit?s critical frequency is______________?
44 / 50
If the negative potential on the control grid of CRT is increased, the intensity of spot _____________?
45 / 50
Long distance transmission is easy for________________?
46 / 50
Demodulation is done in ________________?
47 / 50
Magnetic compass needle will be deflecting if it is kept near________________?
48 / 50
A monostable vibrator has_____________
49 / 50
The frequency and time domain are related through which of the following ?
50 / 50
In the double tuned circuit, if the mutual inductance between the two tuned circuits is decreased, the level of resonance curve ___________________?
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