Electrical Engineering Quiz 54
1 / 50
The conductivity of a conductor can be increased by_______________?
2 / 50
capacitor is to have an energy content of 20J it must be placed across a potential difference of________________?
3 / 50
In a certain five-step R/2R ladder network, the smallest resistor value is 1 k?. The largest value is___________?
4 / 50
In _________ machines, the size of the shaft is decided by the critical speed which depends on the deflection of the shaft?
5 / 50
Riunting in a synchronous motor takes place___________?
6 / 50
A capacitor stores 0.24 coulombs at 10 volts. Its capacitance is___________?
7 / 50
The most widely used rectifier is ________________?
8 / 50
The sensitivity of a voltmeter which uses a 100 ?A meter movement is ____________?
9 / 50
The voltage gain in a transistor connected in___________arrangement is the highest?
10 / 50
When a pure semiconductor is heated, its resistance_________________?
11 / 50
The transconductance of a JFET ranges from ________________?
12 / 50
In reverse blocking mode of a thyristor______?
13 / 50
The materials are a bit inferior conductors of magnetic flux than air
14 / 50
In a Wien-bridge oscillator, if the resistances in the positive feedback circuit are decreased, the frequency____________?
15 / 50
On which of the following factors does the resistivity of a material depend ?
16 / 50
The capacitance, in force-current analogy, is analogous to_____________?
17 / 50
The temperature, under thermal and electrical system analogy, is considered analogous to_______________?
18 / 50
The relay operating speed depends upon_________________?
19 / 50
Which of the following are the passive elements?
20 / 50
has tendency to oscillate______________?
21 / 50
In a single phase full wave rectifier, during blocking state the pea inverse voltage of diode is______________?
22 / 50
Which of the following quantities remain the same in all parts of a series circuit ____________?
23 / 50
If L/C ratio of a parallel LC circuit is increased, the Q of the circuit______________?
24 / 50
The advantage of mercury arc rectifier is that________________?
25 / 50
The resistance in the circuit of the moving coil of a dynamometer wattmeter should be_____________?
26 / 50
A reverse biased pn junction has resistance of the order of________________?
27 / 50
The safest value of current the human body can carry for more than 3 second is_________?
28 / 50
A magnetic field exists around____________?
29 / 50
The load voltage is approximately constant when a Zener diode is ________________?
30 / 50
The frequency response of transformer coupling is___________?
31 / 50
For frequencies below resonant frequency, a series LC circuit behaves as a _____________ load?
32 / 50
The speed of a D.C. shunt motor is required to be more than full load speed. This is possible by______________?
33 / 50
Dummy coil should not be used in_________________?
34 / 50
Which of the following devices will receive voltage surge first travelling on the transmission line ?
35 / 50
In amplitude modulation, bandwidth is ____________ the audio signal frequency?
36 / 50
The intersheaths in the cables are used to_____________?
37 / 50
If the length of a cable is doubled, its capacitance____________?
38 / 50
An SCR is turned off when ________________?
39 / 50
Main causes of noisy solenoid are______________?
40 / 50
While conducting short-circuit test on a transformer the following side is short circuited?
41 / 50
In electrical-pneumatic system analogy the current is considered analogous to_____________?
42 / 50
A JFET is similar in operation to ___________ valve?
43 / 50
The stabilisation of operating point in potential divider method is provided by_______________?
44 / 50
The type of D.C. motor used for shears and punches is_____________?
45 / 50
The internal resistance of a lead-acid cell is that of Edison cell____________?
46 / 50
Internal resistance of ideal voltage source is ?
47 / 50
While starting a synchronous motor by induction motor action, field winding is usually_____________?
48 / 50
In case of a flat compounded generator:
49 / 50
Photocopier and inject printer are dealt in________________?
50 / 50
The relative permittivity of free space is given by__________?
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