Electrical Engineering Quiz 40
1 / 50
In a pure resistive circuit__________?
2 / 50
Electric current passing through the circuit produces_____________?
3 / 50
The power demand can be estimated approximately by____________?
4 / 50
Voltage Series feedback also called series-shunt feedback) results in__________?
5 / 50
The term ?cogging? is associated with___________?
6 / 50
The surge resistance of cable is__________?
7 / 50
Dynamic equalising circuit is useful____________?
8 / 50
The input resistance of a VTVM is about ______________?
9 / 50
The most suited gate pulses given to the AC regulator with R ? L load can be in the form of____________?
10 / 50
The cathdde voltage drop, in a mercury arc rectifier, is due to_____________?
11 / 50
The lead-acid cell should never be discharged beyond____________?
12 / 50
If an ohmmeter reading immediately goes practically to zero and stays there, capacitor is___________?
13 / 50
Power amplifiers generally use transformer coupling because transformer permits______________?
14 / 50
In a synchronous motor, the magnitude of stator back e.m.f. & depends on_______________?
15 / 50
A Weston frequency meter is_____________?
16 / 50
Basically a potentiometer is a device for________________?
17 / 50
Capacitive susceptance is a measure of__________?
18 / 50
A switch has ______________?
19 / 50
When V is the applied voltage, then the breakdown torque of a synchronous motor varies as_________?
20 / 50
method has leading power factor____________?
21 / 50
On which of the following voltage range settings will a voltmeter present the minimum load on a circuit?
22 / 50
The rupture of co-valent bonds will occur when the electric field is__________________?
23 / 50
Murray loop test can be used for location of________________?
24 / 50
The length cf air gap to be provided in __________ is primarily determined by power factor consideration?
25 / 50
For an overhead line, the surge impedance is taken as________________?
26 / 50
In a transistor if ? = 100 and collector current is 10 mA, then IE is___________?
27 / 50
The series field of a short-shunt D.C. generator is excited by_______________?
28 / 50
Which of the following can be measured by the use of a tachogenerator ?
29 / 50
A current amplification of 2000 is a gain of_________________?
30 / 50
Conductance : mho :: ____________?
31 / 50
When a transistor is driven to cut off, ideally the output is _______________?
32 / 50
Very large values of modulation index (greater than 3.24) lead to___________?
33 / 50
The delay fuses are used for the protection of ___________?
34 / 50
Fleming?s right-hand rule regarding direction of induced e.m.f., correlates__________?
35 / 50
A series resonant band-pass filter consists of a 2 mH coil, a 0.005 ?F capacitor, and a 120 ? resistor. The winding resistance of the coil is 12 ?. The output voltage is taken off the resistor. Input voltage is 12 Vrms. What is the output voltage magnitude at the center frequency (f0)?
36 / 50
Effect of moisture on the insulating materials is to________________?
37 / 50
Magnetic field in a D.C. generator is produced by_______________?
38 / 50
The ac voltage controller can be used for ___________?
39 / 50
need frequent starting and stopping of electric motors ?
40 / 50
The motor used on small lathes is usually_________?
41 / 50
In a 3 phase VSI out of eight valid states, the number of valid states that produce zero ac line voltages is/are_________?
42 / 50
Dielectric strength of medium____________?
43 / 50
For which of the following protection from negative sequence currents is provided ?
44 / 50
Two charges are placed at a certain distance. If the magnitude of each charge is doubled the force will become_____________?
45 / 50
In CE arrangement, the value of input impedance is approximately equal to ______________?
46 / 50
An emitter follower has ______________input impedance?
47 / 50
The maximum a.c. power output from a class A power amplifier is 10 W. What should be the minimum power rating of the transistor used ?
48 / 50
An amplifier without feedback has a voltage gain of 50,input resistance os 1 K? & Output resistance of 2.5K?.The input resistance of the current-shunt negative feedback amplifier using the above amplifier with a feedback factor of 0.2 is___________?
49 / 50
A fuse is never inserted in____________?
50 / 50
1 db corresponds to_____________change in voltage or current level?
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