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