Electrical Engineering Quiz 40
1 / 50
Magnetic field in a D.C. generator is produced by_______________?
2 / 50
1 db corresponds to_____________change in voltage or current level?
3 / 50
In a transistor if ? = 100 and collector current is 10 mA, then IE is___________?
4 / 50
In a 3 phase VSI out of eight valid states, the number of valid states that produce zero ac line voltages is/are_________?
5 / 50
Capacitive susceptance is a measure of__________?
6 / 50
method has leading power factor____________?
7 / 50
An emitter follower has ______________input impedance?
8 / 50
The lead-acid cell should never be discharged beyond____________?
9 / 50
Fleming?s right-hand rule regarding direction of induced e.m.f., correlates__________?
10 / 50
Conductance : mho :: ____________?
11 / 50
For which of the following protection from negative sequence currents is provided ?
12 / 50
On which of the following voltage range settings will a voltmeter present the minimum load on a circuit?
13 / 50
In CE arrangement, the value of input impedance is approximately equal to ______________?
14 / 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 ?
15 / 50
Dielectric strength of medium____________?
16 / 50
need frequent starting and stopping of electric motors ?
17 / 50
Power amplifiers generally use transformer coupling because transformer permits______________?
18 / 50
Murray loop test can be used for location of________________?
19 / 50
The ac voltage controller can be used for ___________?
20 / 50
In a synchronous motor, the magnitude of stator back e.m.f. & depends on_______________?
21 / 50
Electric current passing through the circuit produces_____________?
22 / 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___________?
23 / 50
The most suited gate pulses given to the AC regulator with R ? L load can be in the form of____________?
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
The cathdde voltage drop, in a mercury arc rectifier, is due to_____________?
27 / 50
The input resistance of a VTVM is about ______________?
28 / 50
The rupture of co-valent bonds will occur when the electric field is__________________?
29 / 50
Very large values of modulation index (greater than 3.24) lead to___________?
30 / 50
The length cf air gap to be provided in __________ is primarily determined by power factor consideration?
31 / 50
The motor used on small lathes is usually_________?
32 / 50
The power demand can be estimated approximately by____________?
33 / 50
Dynamic equalising circuit is useful____________?
34 / 50
A switch has ______________?
35 / 50
The surge resistance of cable is__________?
36 / 50
A current amplification of 2000 is a gain of_________________?
37 / 50
Which of the following can be measured by the use of a tachogenerator ?
38 / 50
A fuse is never inserted in____________?
39 / 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)?
40 / 50
If an ohmmeter reading immediately goes practically to zero and stays there, capacitor is___________?
41 / 50
For an overhead line, the surge impedance is taken as________________?
42 / 50
Effect of moisture on the insulating materials is to________________?
43 / 50
Basically a potentiometer is a device for________________?
44 / 50
When V is the applied voltage, then the breakdown torque of a synchronous motor varies as_________?
45 / 50
The term ?cogging? is associated with___________?
46 / 50
The delay fuses are used for the protection of ___________?
47 / 50
A Weston frequency meter is_____________?
48 / 50
In a pure resistive circuit__________?
49 / 50
When a transistor is driven to cut off, ideally the output is _______________?
50 / 50
The series field of a short-shunt D.C. generator is excited by_______________?
Provide Your Information
Your score is
The average score is 92%
Restart quiz
