Electrical Engineering Quiz 26
1 / 50
Which of the following method is used for the speed control of DC shunt motor?
2 / 50
Two 1.2 k? resistors are in series and this series combination is in parallel with a 3.3 k? resistor. The total resistance is____________?
3 / 50
Factors on which soil resistance depends_______________?
4 / 50
A certain OP-amp has bias currents of 50 ? The input offset current is_________________?
5 / 50
It is the_________of the transformer on which the magnitude of angle of overlap depends?
6 / 50
The leakage current in a silicon transistor is about_____________ the leakage current in a germanium transistor?
7 / 50
A certain noninverting amplifier has Ri of 1 kO and Rf of 100 kO. The closed-loop voltage gain is_____________?
8 / 50
The power of a n-phase circuit can be measured by using a minimum of_______________?
9 / 50
__________ is invariably used for peak load
10 / 50
A moving-coil permanent-magnet instrument can be used as flux-meter_____________?
11 / 50
The current in a Zener diode is limited by _______________?
12 / 50
____________ is the common method of applying brushes to the commntator?
13 / 50
Generally, the gain of a transistor amplifier falls at high frequencies due to the___________?
14 / 50
Two 300 uH coils in series without mutual coupling have a total inductance of___________?
15 / 50
Potential difference is the work done in moving unit positive charge form one point to another________________?
16 / 50
Among the logic families, the family which can be used at very high frequency greater than 100 MHz in a 4 bit synchronous counter is__________________?
17 / 50
A gain of 1000 times in voltage is expressed by_______________?
18 / 50
The starting torque of a D.C. motor is independent of which of the following?
19 / 50
For similar carrier and modulating signals, the line current used in CSI is_____________?
20 / 50
A heater is rated as 230 V, 10 kW, A.C. The value 230 V refers to__________?
21 / 50
Which of the following loss in a D.C. generator varies significantly with the load current ?
22 / 50
Which of the following capacitors can be used for temperature compensation ?
23 / 50
A permanent magnet______________?
24 / 50
Induction heating takes place it which of the following ?
25 / 50
A voltmeter has a resistance of G ohms and range V volts. The value of resistance required in series to convert it into voltmeter of range nV is________________?
26 / 50
If resistance is 20 Q. and inductance is 27 in a R-L series circuit, then time constant of this circuit will be________?
27 / 50
The common-mode voltage gain is________________?
28 / 50
For radiant heating around 2250?C, the heating elements are made of____________?
29 / 50
The electrode of a direct arc furnace is made of____________?
30 / 50
A 200 turn coil has an inductance of 12 mH. If the number of turns is increased to 400 turns, all other quantities (area, length etc.) remaining the same, the inductance will be___________?
31 / 50
To prevent a DC return between source and load, it is necessary to use___________?
32 / 50
The pulsating torque exerted by steam locomotives causes which of the following ?
33 / 50
Thyristor is nothing but a____________?
34 / 50
Circuit breakers are essentially____________?
35 / 50
A sensitive galvanometer produces large deflection for a_______________?
36 / 50
Natural oil cooling is used for transformers up to a rating of____________?
37 / 50
The initial response when tne output is not equal to input is called_____________?
38 / 50
If an insulating material is operated beyond the maximum allowable temperature, its life is_____________?
39 / 50
Why are the D.C. motors preferred for traction applications ?
40 / 50
___________ ICs are the most commonly used?
41 / 50
____________field is associated with the capacitor?
42 / 50
At absolute temperature, an intrinsic semiconductor has________________?
43 / 50
Anode of an operational SCR is _______________?
44 / 50
In order to achieve high accuracy, the slide wire of a potentiometer should be_______________?
45 / 50
In a D.C. generator, the iron losses mainly take place in___________/
46 / 50
If a D.C. generator fails to build up the probable cause could not be_____________?
47 / 50
The driver stage usually employs_________________?
48 / 50
In electric press, mica is used because it is _________ conductor of heat but/and __________ conductor of electricity?
49 / 50
A full wave rectifier with resistive load produces___________?
50 / 50
At series or parallel resonance, the circuit behaves as a ______________ load?
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