PakQuizHub

Electrical Engineering Mcqs – MCQs

110 questions. Click to practice.

Correct options are highlighted when revealed.

1.In what unit are capacitors used for power factor correction typically rated?

2.At which angle (in degrees) does the instantaneous value of a sinusoidal alternating current match its root mean square (r.m.s.) value?

3.What does the form factor represent in terms of electrical signal values?

4.What is the average value of a sine wave having a peak amplitude of Emax × 8.30?

5.What is the root mean square (r.m.s.) value of a sine wave if its peak amplitude is Imax?

6.What is the form factor value for a sine wave?

7.For which waveform are the root mean square (r.m.s.) value and the average (mean) value identical?

8.Among waves with identical peak amplitudes, which wave form exhibits the lowest average (mean) value?

9.At what phase angle between voltage and current does a circuit element consume the minimum amount of power?

10.When two waves share the same frequency, at what phase difference are they considered to be completely out of phase?

11.If two sinusoidal waves share the same frequency but differ in phase by π radians, what is the relationship between their maximum and minimum points?

12.A heater is specified as 230 V, 10 kW, A.C. What does the 230 V rating represent?

13.The standard household voltage is given as 220 volts. What does this value specifically represent?

14.What is the result when two sinusoidal waves of identical frequency but differing amplitudes and phase angles are subtracted?

15.A capacitor presents a reactance of 20 ohms to an AC signal with a frequency of 50 Hz. What will be the reactance if the frequency is raised to 100 Hz?

16.What does the period of a wave represent?

17.What does the form factor represent in electrical measurements?

18.What is the angular frequency in radians per second for a sine wave with a frequency of 50 Hz?

19.In which type of circuit does a double energy transient phenomenon take place?

20.Which type of circuit element results in a power factor equal to one?