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