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