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Question 1 of 25
1. Question1 points
Henry is equivalent toCorrect
Inductance is flux per ampere.Incorrect
Question 2 of 25
2. Question1 points
A sinusoidal voltage has peak to peak value of 100 V. The rms value isCorrect
Peak value = 50 V, rms value =50/√2 = 35.35 V.Incorrect
Question 3 of 25
3. Question1 points
A capacitor is needed for an ac circuit of 230 V, 50 Hz the peak voltage rating of the capacitor should beCorrect
Peak voltage rating = √2 (rms voltage rating).
Question 4 of 25
4. Question1 points
RMS value of i(t) = 10[1 + sin (- t)] is
Question 5 of 25
5. Question1 points
A 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 isCorrect
At parallel resonance circuit impedance = L/RC
Question 6 of 25
6. Question1 points
Wave A = 100 sin ωt and wave B = 100 cos ωt. ThenCorrect
Since peak values are equal, their rms values are equalIncorrect
Question 7 of 25
7. Question1 points
The current rating of a cable depends onCorrect
Question 8 of 25
8. Question1 points
In an ac circuit, the maximum and minimum values of power factor can beCorrect
Question 9 of 25
9. Question1 points
A capacitor stores 0.15C at 5 V. Its capacitance isCorrect
Q = CV or 0.15 = C(5) or C = 0.03 FIncorrect
Question 10 of 25
10. Question1 points
In an RC series circuit R = 100 Ω and XC = 10 Ω. In this circuit
Question 11 of 25
11. Question1 points
A current is flowing through a conductor with non-uniform area of cross-section. ThenCorrect
Current density = current/area of cross-sectionIncorrect
Question 12 of 25
12. Question1 points
A cable has an insulation resistance of 10¹⁰ ohms. If the length is doubled, the insulation resistance will beCorrect
Question 13 of 25
13. Question1 points
A 3 phase balanced supply feeds 3 phase unbalanced load. Power supplied to the load can be measured by using
Which of the above statements is correct?Correct
Question 14 of 25
14. Question1 points
For a base current of 10 μA, what is the value of collector current in common emitter if βdc = 100Correct
IC = 10 x 100 μA = 1 mA.Incorrect
Question 15 of 25
15. Question1 points
The quiescent collector current IC, and collector to emitter voltage VCE in a CE connection are the values whenCorrect
Question 16 of 25
16. Question1 points
A half wave diode rectifier has a capacitance input filter. If input voltage is Vm sin ωt, PIV isCorrect
Question 17 of 25
17. Question1 points
To protect the diodes in a rectifier and capacitor input filter circuit it is necessary to useCorrect
Resistor reduces surge currentIncorrect
Question 18 of 25
18. Question1 points
In class C operation of an amplifier circuit, the collector current exists forCorrect
Question 19 of 25
19. Question1 points
In a CE amplifier the input impedance is equal to the ratio ofCorrect
Question 20 of 25
20. Question1 points
An amplifier has a large ac input signal. The clipping occurs on both the peaks. The output voltage will be nearly aCorrect
When a sinusoidal voltage is clipped on both sides it resembles a square wave.Incorrect
Question 21 of 25
21. Question1 points
A 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
Question 22 of 25
22. Question1 points
Which power amplifier can deliver maximum load power?Correct
Question 23 of 25
23. Question1 points
The self bias providesCorrect
Question 24 of 25
24. Question1 points
An OR gate has 4 inputs. One input is high and the other three are low. The outputCorrect
Question 25 of 25
25. Question1 points
2’s complement of binary number 0101 isCorrect
1’s complement of 0101 is 1010 and 2’s complement is 1010+1 = 1011.Incorrect