Electrical Engineering Quiz 62
1 / 50
The electromagnet has 50 turns and a current of 1A flows through the coil. If the length of the magnet circuit is 200 mm, what is the magnetic field strength ?
2 / 50
Which of the following is a vector quantity ?
3 / 50
In obtaining the frequency response curve of an amplifier, the______________?
4 / 50
The zero signal IC is generally ______________ mA in the initial stages of a transistor amplifier?
5 / 50
Out of the following statements, concerning an electric field, which statement is not true ?
6 / 50
In a given transformer for given applied voltage, losses which remain constant irrespective of load changes are______________?
7 / 50
In a transformer the resistance between its primary and secondary is____________?
8 / 50
Pure inductive circuit____________?
9 / 50
Which of the following amplifier is used in a digital to analog converter?
10 / 50
For a motor-generator set which of the following motors will be preferred ?
11 / 50
The shape of the torque/slip curve of induction motor is__________?
12 / 50
The power factor of a synchronous motor is better than that of induction motor because
13 / 50
A metal rod of 25 cm length is moving at a speed of 0.5/sec in direction perpendicular to 0.25T magnetic field. Emf produced in the rod is_____________?
14 / 50
If RC and RL represent the collector resistance and load resistance respectively in a single stage transistor amplifier, then a.c. load is____________________?
15 / 50
The number of passenger coaches that can be attached to a diesel engine locomotive on broad gauge is usually restricted to_____________/
16 / 50
Which among the following constitutes the major load for an automobile battery _________?
17 / 50
A.C cannot be used for________________?
18 / 50
Air capacitors are generally available in the range_________?
19 / 50
Which feature, while selecting a.motor for centrifugal pump, will be of least significance ?
20 / 50
Overhead system can be designed for operation up to____________?
21 / 50
The voltage transformation ratio of a transformer is equal to the ratio of_______________?
22 / 50
The following currents are measured in the same direction in a three-branch parallel circuit: 200 mA, 340 mA, and 700 m
23 / 50
Cells are connected in parallel to__________?
24 / 50
Power transformers are generally designed to have maximum efficiency around__________?
25 / 50
In a D.C. machine the number of brush arms is _________ the number of poles?
26 / 50
Low voltage at motor terminals is due to____________?
27 / 50
The relative permittivity has the following units__________?
28 / 50
For crane travel which of the following motors is normally used ?
29 / 50
Diesel power plant are generally used as___________?
30 / 50
A.C can not be used for_______________?
31 / 50
In a transformer the tappings are generally provided on_____________?
32 / 50
If a sinusoidal wave has frequency of 50 Hz with 30 A r.m.s. current which of the following equation represents this wave_________ ?
33 / 50
For which of the following materials the net magnetic moment should be zero ?
34 / 50
Which of the following devices should be used for accurate measurement of low D.C. voltage ?
35 / 50
is usually used for brush rockers____________?
36 / 50
transmission line has reflection coefficient as one?
37 / 50
Self charge of a Ni-Fe cell is _______ Edison cell
38 / 50
Generally grounding is provided for
39 / 50
Power factor of an electrical circuit is equal to____________?
40 / 50
D.C. machines designed with a large value of air gap length have_____________?
41 / 50
For a voltage source:
42 / 50
Power electronics essentially deals with control of a.c. power at____________?
43 / 50
The action of JFET in its equivalent circuit can best be represented as a_____________?
44 / 50
The parallel combination of a 470 ? resistor and a 1.2 k? resistor is in series with the parallel combination of three 3 k? resistors. A 200 V source is connected across the circuit. The resistor with the most current has a value of____________?
45 / 50
In a lead-acid cell dilute sulfuric acid (electrolyte) approximately comprises the following__________?
46 / 50
___________ will offer the least load.
47 / 50
Negative plate of an Edison cell is made of__________?
48 / 50
A power MOSFET has three terminals called___________?
49 / 50
Which one of the following devices does not function like an electric motor ?
50 / 50
The Q of a tuned amplifier is 50. If the resonant frequency for the amplifier is 1000kHZ, then bandwidth is __________________?
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