Electrical Engineering Quiz 59
1 / 50
In BJT, the forward biased base emitter junction inject holes from base to emitter, the holes_______?
2 / 50
The design of mechanical parts is particularly important in case of __________ speed machines?
3 / 50
For constant torque drive which speed control method is preferred ?
4 / 50
A 12 k? resistor, a 15 k? resistor, and a 22 k? resistor are in series with two 10 k? resistors that are in parallel. The source voltage is 75 V. Current through the 15 k? resistor is approximately___________?
5 / 50
Which of the following insulation is used in cables ?
6 / 50
The purpose of providing iron core in a step-up transformer is?
7 / 50
Which of the following is a bilateral element?
8 / 50
Which of the following is the non-linearity caused by servomotor ?
9 / 50
A 10 V power supply would use ____________ as filter capacitor?
10 / 50
In a three-phase induction motor__________?
11 / 50
In an AC co-ordinate potentiometer, the currents in the phase and quadrature potentiometer are adjusted to be_____________?
12 / 50
Double tuned circuits are used in ____________ stages of a radio receiver?
13 / 50
An ammeter should have_____________ resistance?
14 / 50
Which of the following single-phase motors is suitable for timing and control purposes ?
15 / 50
A cable carrying alternating current has__________?
16 / 50
Light duty cranes are used in which of the following ?
17 / 50
Five light bulbs are connected in parallel across 110 V. Each bulb is rated at 200 W. The current through each bulb is approximately___________?
18 / 50
In a load curve the highest point represents______________?
19 / 50
Which of the following, in a thermal power plant, is not a fixed cost?
20 / 50
Four resistors are connected in parallel. Fifteen mA flows through resistor R. If the second resistor is 2R, the third resistor 3R, and the fourth resistor 4R, the total current in the circuit is______________?
21 / 50
The power factor of a D.C. circuit is always__________?
22 / 50
In a D.C. generator:___________________?
23 / 50
In a transistor, the base current is about_________of emitter current?
24 / 50
The loads on distributors systems are generally__________________?
25 / 50
Which of the following should be used for extinguishing electrical fires?
26 / 50
In an RC coupled amplifier, the voltage gain over mid-frequency range_____________?
27 / 50
Two D.C. shunt generators, each with armature resistance of 0.02 ohm and field resistance of 50 ohm run in parallel and supply a total current of 1000 amperes to the load circuit. If their e.m.fs. are 270 V and 265 V, their bus bar voltage will be_____________________?
28 / 50
A thyristor is basically________?
29 / 50
Addition of 0.3 to 4.5% silicon to iron ________ the electrical resistivity of iron?
30 / 50
If the input capacitor of a transistor amplifier is short-circuited, then_________________?
31 / 50
A transistor behaves as a linear device for _____________?
32 / 50
A VTVM has_____________input resistance than that of a multi meter?
33 / 50
A conductor carries 125 amperes of current under 60? to a magnetic field of 1.1 tesla. The force on the conductor will be nearly______________?
34 / 50
The arc voltage produced in A.C. circuit breaker is always_____________?
35 / 50
In the case of an unsymmetrical alternating current the average value must always be taken over__________?
36 / 50
A glass rod when rubbed with silk cloth is charged because__________?
37 / 50
In an RC coupling scheme, the coupling capacitor CC must be large enough______________?
38 / 50
Leakage current flows through the thyristor in_________?
39 / 50
Materials exhibiting zero value of resistivity are known as ____________ ?
40 / 50
The chemical used in breather for transformer should have the quality of____________?
41 / 50
The capacity of a crane is expressed in terms of_______________?
42 / 50
The commonly used material for shielding or screening magnetism is____________?
43 / 50
The purpose of using short-circuit gear is___________?
44 / 50
Compared to transistor, _________ have lower on state conduction losses and higher power handling capability?
45 / 50
In a dynamometer 3-phase power factor meter, the planes of the two moving coils are at_____________?
46 / 50
Which of the following circuit elements will oppose the change in circuit current ?
47 / 50
At _______ frequencies the parallel R-L circuit behaves as purely resistive
48 / 50
___________________has least range of speed control?
49 / 50
The transient currents are associated with the____________?
50 / 50
If two charges are increased by two times then force_____________?
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