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1.Total No Of Question25
2.Total Time15 Minutes
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 Answered
 Review

Question 1 of 25
1. Question
1 pointsHenry is equivalent to
Correct
Inductance is flux per ampere.
Incorrect

Question 2 of 25
2. Question
1 pointsA sinusoidal voltage has peak to peak value of 100 V. The rms value is
Correct
Peak value = 50 V, rms value =50/√2 = 35.35 V.
Incorrect

Question 3 of 25
3. Question
1 pointsA capacitor is needed for an ac circuit of 230 V, 50 Hz the peak voltage rating of the capacitor should be
Correct
Peak voltage rating = √2 (rms voltage rating).
=√2x230VIncorrect

Question 4 of 25
4. Question
1 pointsRMS value of i(t) = 10[1 + sin ( t)] is

Question 5 of 25
5. Question
1 pointsA two branch parallel circuit has a 20 Ω resistance and 1 H inductance in one branch and a 100 μF capacitor in the second branch. It is fed from 100 V ac supply, at resonance, the input impedance of the circuit is
Correct
At parallel resonance circuit impedance = L/RC
=1/20×100×10⁻⁶
=10000/20
=500Incorrect

Question 6 of 25
6. Question
1 pointsWave A = 100 sin ωt and wave B = 100 cos ωt. Then
Correct
Since peak values are equal, their rms values are equal
Incorrect

Question 7 of 25
7. Question
1 pointsThe current rating of a cable depends on
Correct
Incorrect

Question 8 of 25
8. Question
1 pointsIn an ac circuit, the maximum and minimum values of power factor can be
Correct
Incorrect

Question 9 of 25
9. Question
1 pointsA capacitor stores 0.15C at 5 V. Its capacitance is
Correct
Q = CV or 0.15 = C(5) or C = 0.03 F
Incorrect

Question 10 of 25
10. Question
1 pointsIn an RC series circuit R = 100 Ω and XC = 10 Ω. In this circuit

Question 11 of 25
11. Question
1 pointsA current is flowing through a conductor with nonuniform area of crosssection. Then
Correct
Current density = current/area of crosssection
Incorrect

Question 12 of 25
12. Question
1 pointsA cable has an insulation resistance of 10¹⁰ ohms. If the length is doubled, the insulation resistance will be
Correct
R∝1/L
Incorrect

Question 13 of 25
13. Question
1 pointsA 3 phase balanced supply feeds 3 phase unbalanced load. Power supplied to the load can be measured by using
1.Two wattmeter
2.One wattmeter
3.Three wattmeter
Which of the above statements is correct?Correct
Incorrect

Question 14 of 25
14. Question
1 pointsFor a base current of 10 μA, what is the value of collector current in common emitter if βdc = 100
Correct
IC = 10 x 100 μA = 1 mA.
Incorrect

Question 15 of 25
15. Question
1 pointsThe quiescent collector current IC, and collector to emitter voltage VCE in a CE connection are the values when
Correct
Incorrect

Question 16 of 25
16. Question
1 pointsA half wave diode rectifier has a capacitance input filter. If input voltage is Vm sin ωt, PIV is
Correct
Incorrect

Question 17 of 25
17. Question
1 pointsTo protect the diodes in a rectifier and capacitor input filter circuit it is necessary to use
Correct
Resistor reduces surge current
Incorrect

Question 18 of 25
18. Question
1 pointsIn class C operation of an amplifier circuit, the collector current exists for
Correct
Incorrect

Question 19 of 25
19. Question
1 pointsIn a CE amplifier the input impedance is equal to the ratio of
Correct
Incorrect

Question 20 of 25
20. Question
1 pointsAn amplifier has a large ac input signal. The clipping occurs on both the peaks. The output voltage will be nearly a
Correct
When a sinusoidal voltage is clipped on both sides it resembles a square wave.
Incorrect

Question 21 of 25
21. Question
1 pointsA clamper circuit
1.adds or subtracts a dc voltage to a waveform
2.does not change the waveform
3.amplifiers the waveform
Which are correct?Correct
Incorrect

Question 22 of 25
22. Question
1 pointsWhich power amplifier can deliver maximum load power?
Correct
Incorrect

Question 23 of 25
23. Question
1 pointsThe self bias provides
Correct
Incorrect

Question 24 of 25
24. Question
1 pointsAn OR gate has 4 inputs. One input is high and the other three are low. The output
Correct
Incorrect

Question 25 of 25
25. Question
1 points2’s complement of binary number 0101 is
Correct
1’s complement of 0101 is 1010 and 2’s complement is 1010+1 = 1011.
Incorrect