Electrical Engineering Quiz 11
1 / 50
The lower and upper cut off frequencies are also called_____________frequencies?
2 / 50
A 500 turns solenoid develops an average induced voltage of 60 V. Over what time interval must a flux change of 0.06 Wb occur to produce such a voltage ?
3 / 50
The magnitude of field flux in a 3-phase synchronous motor?
4 / 50
The materials having low retentivity are suitable for making_____________?
5 / 50
If an induction motor with certain ratio of rotor to stator slots, runs at 1/7 of the normal speed, the phenomenon will be termed as____________?
6 / 50
In a R-L-C circuit_________?
7 / 50
In variable frequency, PWM gain
8 / 50
Which of the following capacitors is marked for polarity ?
9 / 50
Core of an electromagnet should have____________?
10 / 50
The forced oil and air circulation method is usual one for transformers of capacities____________?
11 / 50
The shaft of synchronous motor is made of____________?
12 / 50
The maximum speed of electronic switch can be _____________operations per second?
13 / 50
Greater the secondary leakage flux____________?
14 / 50
A bistable multivibrator has _________________?
15 / 50
For which of the following applications D.C. motors are still preferred ?
16 / 50
A MOSFET is sometimes called______________ JFET?
17 / 50
Induction furnaces are employed for which of the following ?
18 / 50
For a cell to work, which of the following condition(s) become necessary ___________?
19 / 50
The commercial sources of energy are____________?
20 / 50
The specific energy consumption of a train depends on which of the following ?
21 / 50
Which of the following materials is the best conductor of electricity ?
22 / 50
An ideal voltage source has__________?
23 / 50
In pakistan, ______________ modulation is used for radio transmission?
24 / 50
Most of the amplification in a superhetrodyne receiver occurs at ______________stage?
25 / 50
The tail current of a differential amplifier is_______________?
26 / 50
Mass, in force-voltage analogy, is analogous to________________?
27 / 50
In an iron cored coil the iron core is removed so that the coil becomes an air cored coil. The inductance of the coil will_____________?
28 / 50
The number of brushes in a commutator depends on______________?
29 / 50
A single phase full bridge inverter can operate in load commutation mode in case load consists of____________?
30 / 50
In a purely inductive circuit__________?
31 / 50
A Zener voltage regulator will cease to act as a voltage regulator if Zener current becomes______________?
32 / 50
The percentage 02 by volume in atmosphere air is____________?
33 / 50
_________ is an example of piezoelectric material?
34 / 50
The breakdown voltage of a cable depends on_____________?
35 / 50
If cathode and anode connections in a mercury arc rectifier are inter changed_____________?
36 / 50
Due to which of the following co-efficient of adhesion improves ?
37 / 50
Which of the following is not an operating cost?
38 / 50
The emf induced in a conductor of unit length moving with unit velocity at right angles to a magnetic field is equal to_____________?
39 / 50
Bus coupler is very essential in arrangement______________?
40 / 50
_____________coupling provides the maximum voltage gain?
41 / 50
Which of the following factors adversely affects the capacity of the leadacid battery ?
42 / 50
Average resistance of human body is____________?
43 / 50
Three 60 W bulbs are in parallel across the 60 V power line. If one bulb burns open_________________?
44 / 50
A booster is a_________________?
45 / 50
In a transformer routine efficiency depends upon_____________?
46 / 50
For a D.C. machines laboratory following type of D.C. supply will be suitable___________?
47 / 50
The property of a capacitor to store electricity is called its____________?
48 / 50
Steam turbines commonly used in steam power station are__________?
49 / 50
An AND gate will function as OR if________________?
50 / 50
When a negative voltage feedback is applied to an amplifier, its bandwidth_____________?
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