Electrical Engineering Quiz 45
1 / 50
A control system with excessive noise, is likely to suffer from_______________?
2 / 50
As hysteresis motors are free from mechanical and magnetic vibrations therefore these are considered as suitable for__________?
3 / 50
The ratio of output impedance of a CE amplifier is _______________?
4 / 50
The chemical used in breather is_______________?
5 / 50
On which of the following factors skin effect depends?
6 / 50
The r.m.s. value of half wave rectified sine wave is 200 V. The r.m.s. value of full wave rectified AC will be___________?
7 / 50
It is generally desired that a transistor should have_____________________ input impedance?
8 / 50
The encapsulation of transistor is necessary for__________?
9 / 50
Relays can be designed to respond to changes in________________?
10 / 50
_______________is an open loop control system?
11 / 50
In order to increase the damping of a badly underdamped system which of following compensators may be used ?
12 / 50
A dc power supply has no-load voltage of 30v,and a full-load voltage of 25v at full-load current of 1A.Its output resistance & load regulation ,respectively are_____________?
13 / 50
Digital computers are more widely used as compared to analog computers, because they are______________?
14 / 50
An instrument which detects electric current is known as_____________?
15 / 50
If the a.c. input to a half-wave rectifier is an r.m.s value of 400/?2 volts, then diode PIV rating is__________________?
16 / 50
An integrating circuit is a simple RC series circuit with output taken across ______________?
17 / 50
A synchronous motor which works on a leading power factor and does not drive a mechanical load is called as_________?
18 / 50
A paper capacitor is usually available in the form of_____________?
19 / 50
Which one of the following is not the function of pole shoes in a D.C. machine ?
20 / 50
In a CE amplifier, the phase difference between voltage across collector load RC and signal voltage is _________________?
21 / 50
The power transformer is a constant______________?
22 / 50
In the analysis of which of the following lines shunt capacitance is neglected?
23 / 50
Under normal charging rate, the charging current should be__________?
24 / 50
When an alternator connected to the bus-bar is shut down the bus-bar voltage will___________?
25 / 50
A practical formula for determining the thickness of insulation between low voltage and high voltage windings is__________________?
26 / 50
A short-circuit is identified by_____________?
27 / 50
How many op-amps are required to implement this equation Vo = V1?
28 / 50
The maximum di/dt in a SCR is____________?
29 / 50
The total losses in a well designed D.C. generator of 10 kW will be nearly______________?
30 / 50
The most inexpensive switch is _____________ switch?
31 / 50
A galvanometer of resistance G is shunted by a very small resistance S. The resistance of the resulting ammeter is ______________?
32 / 50
A crystal diode has forward resistance of the order of ________________?
33 / 50
An SCR behaves as a____________switch?
34 / 50
By the use of which of the following m D.C. can be obtained from AC ?
35 / 50
A GTO can be turned on by applying___________?
36 / 50
Speed control by Ward Leonard method gives uniform speed variation_____________?
37 / 50
A 3-phase induction motor delta connected is carrying too heavy load and one of its fuses blows out. Then the motor______________?
38 / 50
A laminated iron core has reduced eddy-current losses because____________?
39 / 50
The multivibrator which generates square wave of its own is the ____________multivibrator?
40 / 50
Any electrical signal present in a circuit other than the desired signal is known as______________?
41 / 50
A power transformer is usually rated in____________?
42 / 50
Emitter follower is a _______________circuit?
43 / 50
An over-excited synchronous motor takes__________?
44 / 50
Which of the following does not change in a transformer ?
45 / 50
If the operating point changes, the h parameters of transistor_____________?
46 / 50
DOL starting of induction motors is usually restricted to_____________?
47 / 50
The mechanical displacement of the rotor with respect to the stator, in polyphase multipolar synchronous motors running at full load, is of the order of_____________?
48 / 50
For a D.C. shunt motor which of the following is incorrect ?
49 / 50
A certain cable has an insulation of relative permittivity 4. If the insulation is replaced by one of relative permittivity 2, the capacitance of the cable will become_____________?
50 / 50
The pulsating d.c. applied to power amplifier causes________________?
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