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Electrical engineering MCQ question and answer:

Answers are noted by red color.

1. Conventional flow assumes charge flow from...?

A. Positive to negative
B. Negative to positive
C. Positive to positive

 

2. Series resonance circuit occurs when ...?

A. XL=XC
B. Z=R
C. Both A&B

 

3. What is the other name of relative permittivity?

A.  Specific inductance capacity
B. Dielectic strenth
C. Breakdown voltage

 

4. VL=VC in a series RLC circuit when...?

A. The Power factor is Zero
B.The value of the impedance is minimum
C. The total voltage is zero

 

5. The ratio of W/VA in an AC circuit means...?

A. Power factor
B. Quality factor
C. Form factor

 

6.The symbol of Q refers to...?

A.Quality factor
B. power factor
C. Peak factor

 

7. Electron flow assumes charges flow from...?

A. Positive to negative
B. Positive to positive
C. Negative to positive

 

8. What is the reciprocal quality factor?

A. Dissipation factor
B. Power factor
C. 1/Q factor

 

9. At what frequency will an inductor of 5mH have the same reactance as a capacitor of 0.1uF?

A. 5 KHZ
B. 7.12 kHZ
C. 9 KHZ

 

10. In a series RLC circuit...?

A.Current lags the voltage by 90 degree
B. Current leads the voltage by 90 degree
C. Current and voltage are unity

 

11. Which of the following condition is not true or a series RLC circuit...?

A. XL=XC
B. Unity P.F.
C. Z=XL

 

12. The current is ........... times the maximum current at half power points of a resonance curve.

A. 1.414
B. 2.204
C.0.707

 

 13. A gang capacitor is a variable capacitor in which capacitance is varied by changing...?

A. Number of plates
B. Plate area
C. Dielectric

 

14. Where the current through the inductance lags its induced voltage by 90 degree?

A. DC circuit
B. AC circuit
C. Both of them

 

15. What is the specific resistance of a pure germanium?

A. 60 Ohm-cm
B. 55 Ohm-cm
C. 50 Ohm-cm

 

16. Two capacitor of capacitance 9uF and 18uF in series.  total capacitance is?

A. 6 pF
B. 2 uF
c. 27 uF

 

17. In a series RLC circuit?

A. XL & XC changed by frequency change
B. Impedance will always decrease
C. None of them

 

18. A series circuit has a ........... power factor at its half power point.

A. Unity
B. Leading
C. Lagging
Answer  is either B or C

 

19. Kirchhoffs lows are applicable for....?

A. DC circuit
B. AC circuit
C. Mainly DC as well AC circuit

 

20. A tank circuit is a...?

A. Parallel LC circuit
B. series circuit
C. Resonant

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Tags:

  • AC circuit

  • Basic circuit

  • Resonant circuit

  • EEE MCQ

  • Job preparation

  • Question and answer

  • DC circuit

  • Short question