Electrical Engineering Quiz 40
1 / 50
Conductance : mho :: ____________?
2 / 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)?
3 / 50
The most suited gate pulses given to the AC regulator with R ? L load can be in the form of____________?
4 / 50
The motor used on small lathes is usually_________?
5 / 50
Effect of moisture on the insulating materials is to________________?
6 / 50
Fleming?s right-hand rule regarding direction of induced e.m.f., correlates__________?
7 / 50
When V is the applied voltage, then the breakdown torque of a synchronous motor varies as_________?
8 / 50
An emitter follower has ______________input impedance?
9 / 50
Magnetic field in a D.C. generator is produced by_______________?
10 / 50
The cathdde voltage drop, in a mercury arc rectifier, is due to_____________?
11 / 50
1 db corresponds to_____________change in voltage or current level?
12 / 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 ?
13 / 50
A Weston frequency meter is_____________?
14 / 50
method has leading power factor____________?
15 / 50
When a transistor is driven to cut off, ideally the output is _______________?
16 / 50
Which of the following can be measured by the use of a tachogenerator ?
17 / 50
On which of the following voltage range settings will a voltmeter present the minimum load on a circuit?
18 / 50
The ac voltage controller can be used for ___________?
19 / 50
A switch has ______________?
20 / 50
The series field of a short-shunt D.C. generator is excited by_______________?
21 / 50
The power demand can be estimated approximately by____________?
22 / 50
The rupture of co-valent bonds will occur when the electric field is__________________?
23 / 50
Very large values of modulation index (greater than 3.24) lead to___________?
24 / 50
Two charges are placed at a certain distance. If the magnitude of each charge is doubled the force will become_____________?
25 / 50
Voltage Series feedback also called series-shunt feedback) results in__________?
26 / 50
Basically a potentiometer is a device for________________?
27 / 50
The surge resistance of cable is__________?
28 / 50
For an overhead line, the surge impedance is taken as________________?
29 / 50
Dielectric strength of medium____________?
30 / 50
Murray loop test can be used for location of________________?
31 / 50
The term ?cogging? is associated with___________?
32 / 50
In a 3 phase VSI out of eight valid states, the number of valid states that produce zero ac line voltages is/are_________?
33 / 50
Capacitive susceptance is a measure of__________?
34 / 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___________?
35 / 50
Electric current passing through the circuit produces_____________?
36 / 50
If an ohmmeter reading immediately goes practically to zero and stays there, capacitor is___________?
37 / 50
For which of the following protection from negative sequence currents is provided ?
38 / 50
A current amplification of 2000 is a gain of_________________?
39 / 50
A fuse is never inserted in____________?
40 / 50
In a pure resistive circuit__________?
41 / 50
In a transistor if ? = 100 and collector current is 10 mA, then IE is___________?
42 / 50
Dynamic equalising circuit is useful____________?
43 / 50
need frequent starting and stopping of electric motors ?
44 / 50
The length cf air gap to be provided in __________ is primarily determined by power factor consideration?
45 / 50
Power amplifiers generally use transformer coupling because transformer permits______________?
46 / 50
In CE arrangement, the value of input impedance is approximately equal to ______________?
47 / 50
The delay fuses are used for the protection of ___________?
48 / 50
In a synchronous motor, the magnitude of stator back e.m.f. & depends on_______________?
49 / 50
The lead-acid cell should never be discharged beyond____________?
50 / 50
The input resistance of a VTVM is about ______________?
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