Basic Electrical Engineering Online Test

1. Usually phasor diagrams are drawn representing?

2. Inductance is _____________________ to number of turns in the coil.

3. Reluctance is ________________ to the length of the material.

4. The type of capacitors used in communication transmitters are?

5. If Im is the maximum value of a sinusoidal voltage, what is the instantaneous value?

6. A field that spreads outwards in all directions is __________

7. What happens to the voltage across the capacitor when the Q factor increases?

8. Capacitor blocks__________ after long time.

9. Find the reactive power when the average power is 5W and Q=2.

10. What is the final current while charging a capacitor?

11. What is the magnetic field outside a solenoid?

12. The total number of magnetic field lines passing through an area is termed as?

13. The flux linkage in coil 1 is 3 Wb and it has 500 turns and the current in coil 2 is xA, calculate the value of x if the mutual inductance is 750H.

14. A coil has a resistance of 4 ohms and an inductance of 2H. It is connected to a 20V dc supply. Calculate the value of current 1s after the switch is closed.

15. The phenomenon due to which there is an induced current in one coil due to the current in a neighbouring coil is?

16. The combination of resistance and reactance known as ___________

17. What is the unit for relative permittivity?

18. In a variable capacitor, capacitance can be varied by ______

19. Paramagnetic substances have relative permeability_____________

20. Which of the following statements are true about metals?

21. Calculate the current in the capacitor having 2V supply voltage and 3F capacitance in 2seconds.

22. The quadrature component is also known as?

23. Which, among the following, have negative susceptibility?

24. If 2V is supplied to a 3F capacitor, calculate the charge stored in the capacitor.

25. Find the current in the 4 ohm resistor.

26. At steady state, the current in the inductor is?

27. Calculate the short circuit current is the 5 ohm resistor is the load resistance.

28. What happens when one material is rubbed against another?

29. In order to obtain a high value for capacitance, the permittivity of the dielectric medium should be?

30. Practically, if 10kJ of energy is supplied to a device, how much energy will the device give back?

31. Calculate the equivalent resistance between A and B.

32. Find the value of Vx due to the 10V source.

33. Find the value of x if the Mutual inductance is 20H, the inductance of coil 1 is xH and the inductance of coil 2 is 8H. The coupling coefficient is 5.

34. Which among the following is an expression for energy?

35. The B/H ratio is not constant for ________

36. When will capacitor fully charged?

37. If there are 10 nodes in a circuit, how many equations do we get?

38. What is the expression for force in a current carrying conductor?

39. Superposition theorem is valid for _________

40. What is the power factor of a series RLC circuit under resonance condition?

41. If either the inductance or the rate of change of current is doubled, the induced e.m.f?

42. In an RLC circuit, which of the following is always used as a vector reference?

43. Calculate the current in an inductor if the energy stored is 160J and the inductance is 20H.

44. A 4microF capacitor is charged to 120V, the charge in the capacitor would be?

45. Batteries are generally connected in______

46. Shape of the resonance curve depends upon the?

47. If the charge in a capacitor is 4C and the energy stored in it is 4J, calculate the voltage across its plates.

48. The rms value is 0.707 times the _________ value.

49. What is the conduction current when a capacitor is fully charged?

50. If tan ϕ = 10 and the resistance is 2 ohm, calculate the inductive reactance.