Electrical Engineering Quiz 39
1 / 50
The biasing circuit has a stability factor of 50. If due to temperature change, ICBO changes by 1 ?A, then IC will change by___________________?
2 / 50
An electric field can deflect_______________?
3 / 50
The average charging voltage for alkali cell is about__________?
4 / 50
Which of the following devices may be used to provide protection against lightening over voltages?
5 / 50
Class C amplifiers are used as ___________________?
6 / 50
The binary code of (21.125)10 is_______________?
7 / 50
The operating point is also called the _______________?
8 / 50
The peak value of a sine wave is 200 V. Its average value is___________?
9 / 50
Short-circuit currents are due to_______________?
10 / 50
Which of the following expression is correct for electric field strength___________?
11 / 50
A device able to supply electrical energy is a __________?
12 / 50
Which type of winding is used in 3 phase shell-type transformer?
13 / 50
Which of the following braking systems on the locomotives is costly ?
14 / 50
In a D.C. generator in order to reduce sparking at brushes, the self-induced e.m.f. in the coil is neutralised by all of the following except______________?
15 / 50
Temporary magnets are used in______________?
16 / 50
Owing to skin effect:
17 / 50
Which of the following is the basic consideration in the design of insulation ?
18 / 50
In the normal operation of an SCR, anode is __________ w.r.t. cathode?
19 / 50
The relative permeability of a ferromagnetic material is_____________?
20 / 50
Which of the following statement is true __________?
21 / 50
A single-phase induction motor is__________?
22 / 50
The scale of a rectifier instrument is_________________?
23 / 50
The characteristics of drive for crane hoisting and lowering are which of the following ?
24 / 50
Five 2 V cells are connected in parallel. The output voltage is__________?
25 / 50
The property of a material which opposes the creation of magnetic flux in it is known as_____________?
26 / 50
Energy stored in a magnetic field is given by______________?
27 / 50
Hysteresis loss and eddy current loss are used in____________?
28 / 50
The element that has the biggest size in a transistor is____________?
29 / 50
Rise time is defined by the interval when____________?
30 / 50
Anode current in an SCR consists of____________?
31 / 50
The piezoelectric effect in a crystal is___________?
32 / 50
The impurity level in an extrinsic semiconductor is about_______________of pure semiconductor ?
33 / 50
A differential amplifier______________?
34 / 50
Economiser is used to heat_____________?
35 / 50
An astable multivibrator has ________________?
36 / 50
Most of the digital computers do not have floating point hardware because_____________?
37 / 50
Locomotives with monometer bogies have_________________?
38 / 50
The travelling speed of cranes varies from_________________?
39 / 50
A capacitor stores 0.24 coulombs at 10 volts. Its capacitance is_____________?
40 / 50
When a transistor is cut off _________________?
41 / 50
A pure inductance connected across 250 V, 50 Hz supply consumes 100 W. This consumption can be attributed to_________?
42 / 50
Spread time is defined as the interval during which_____________?
43 / 50
Self inductance of a coil depends upon________________?
44 / 50
If voltage feedback (negative) is applied to an amplifier, its output impedance ______________?
45 / 50
The susceptibility of paramagnetic materials generally lies between____________?
46 / 50
A thyristor equivalent of a thyratron tube is a _________?
47 / 50
A consumer has to pay lesser fixed charges in____________?
48 / 50
A certain regulator has a no-load voltage of 6 V and a full-load output of 5.82 V. What is the load regulation ?
49 / 50
If the input a.c. voltage to regulated or ordinary power supply increases by 5% what will be the approximate change in d.c. output voltage?
50 / 50
The function of shunt in an ammeter is to______________?
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