Electrical Engineering Quiz 40
1 / 50
The series field of a short-shunt D.C. generator is excited by_______________?
2 / 50
Which of the following can be measured by the use of a tachogenerator ?
3 / 50
Dielectric strength of medium____________?
4 / 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)?
5 / 50
The most suited gate pulses given to the AC regulator with R ? L load can be in the form of____________?
6 / 50
When a transistor is driven to cut off, ideally the output is _______________?
7 / 50
Effect of moisture on the insulating materials is to________________?
8 / 50
The length cf air gap to be provided in __________ is primarily determined by power factor consideration?
9 / 50
In a pure resistive circuit__________?
10 / 50
need frequent starting and stopping of electric motors ?
11 / 50
Voltage Series feedback also called series-shunt feedback) results in__________?
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
An emitter follower has ______________input impedance?
14 / 50
A current amplification of 2000 is a gain of_________________?
15 / 50
On which of the following voltage range settings will a voltmeter present the minimum load on a circuit?
16 / 50
Two charges are placed at a certain distance. If the magnitude of each charge is doubled the force will become_____________?
17 / 50
The ac voltage controller can be used for ___________?
18 / 50
In a 3 phase VSI out of eight valid states, the number of valid states that produce zero ac line voltages is/are_________?
19 / 50
A Weston frequency meter is_____________?
20 / 50
The rupture of co-valent bonds will occur when the electric field is__________________?
21 / 50
For an overhead line, the surge impedance is taken as________________?
22 / 50
Magnetic field in a D.C. generator is produced by_______________?
23 / 50
For which of the following protection from negative sequence currents is provided ?
24 / 50
If an ohmmeter reading immediately goes practically to zero and stays there, capacitor is___________?
25 / 50
Conductance : mho :: ____________?
26 / 50
The power demand can be estimated approximately by____________?
27 / 50
Fleming?s right-hand rule regarding direction of induced e.m.f., correlates__________?
28 / 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___________?
29 / 50
The term ?cogging? is associated with___________?
30 / 50
Electric current passing through the circuit produces_____________?
31 / 50
Very large values of modulation index (greater than 3.24) lead to___________?
32 / 50
The delay fuses are used for the protection of ___________?
33 / 50
In CE arrangement, the value of input impedance is approximately equal to ______________?
34 / 50
The surge resistance of cable is__________?
35 / 50
The input resistance of a VTVM is about ______________?
36 / 50
When V is the applied voltage, then the breakdown torque of a synchronous motor varies as_________?
37 / 50
Capacitive susceptance is a measure of__________?
38 / 50
In a synchronous motor, the magnitude of stator back e.m.f. & depends on_______________?
39 / 50
A switch has ______________?
40 / 50
Dynamic equalising circuit is useful____________?
41 / 50
1 db corresponds to_____________change in voltage or current level?
42 / 50
Power amplifiers generally use transformer coupling because transformer permits______________?
43 / 50
Murray loop test can be used for location of________________?
44 / 50
The cathdde voltage drop, in a mercury arc rectifier, is due to_____________?
45 / 50
The motor used on small lathes is usually_________?
46 / 50
A fuse is never inserted in____________?
47 / 50
The lead-acid cell should never be discharged beyond____________?
48 / 50
In a transistor if ? = 100 and collector current is 10 mA, then IE is___________?
49 / 50
method has leading power factor____________?
50 / 50
Basically a potentiometer is a device for________________?
Provide Your Information
Your score is
The average score is 92%
Restart quiz
