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