Module 3

Module 3 quiz contains 52 question based on the syllabus for module 3 examination for B1.1, B1.3 and B2 category.

The time limit for the quiz is 65 min.

The number of attempts allowed are unlimited.

All the best.

1. 
One of the laws of magnetism states-'the force between two magnetic poles of constant strength is:

2. 
A coil has an inductance of 8 mH with 125 turns. When the number of turns is doubled within the same length, the inductance will become:

3. 
A circuit with a current of 6A has it's resistance doubled the new current is:

4. 
What is the duration of one cycle known as

5. 
An inductor of 50mH is connected in series with a resistance of 10kΩ. The time taken for the current to reach 63.2% of the maximum is:

6. 
Which of the following is a low pass filter?

7. 
The commutator segments of a generator will:

8. 
An alternating current series circuit contains resistance of 100 ohms, XL reactance of 100 ohms and XC reactance of 100 ohms. The impedance will be:

9. 
The average value of an alternating current waveform over a complete cycle is:

10. 
Which among the following equations is incorrect?

11. 
Which of the following is a passive device?

12. 
The Electron Valence of an Element with 5 electrons is:

13. 
The negative electrode (plate) of a fully charged lead- acid cell is:

14. 
What is the total capacitance when two capacitors C1 and C2 are connected in series?

15. 
In a parallel circuit, with a number of resistors, the voltage across each resistor is

16. 
An alternating current voltage waveform has a root mean square value of 70.7 volts the peak to peak voltage is:

17. 
When the supply frequency increases, what happens to the capacitive reactance in the circuit?

18. 
In a lead acid cell, the specific gravity of the electrolyte:

19. 
In the diagram an unknown resistance is being measured using a Wheatstone bridge. The bridge is balanced. The unknown resistance is:

20. 
What happens to the current in the series circuit if the resistance is doubled?

21. 
For high frequencies, capacitor acts as

22. 
A 4 ohm resistor and an inductor of 3 ohms reactance are connected in series the impedance of the circuit is:

23. 
The combination of two 0.02uF 500V capacitors in parallel has a capacitance and working voltage rating of:

24. 
If 35 coulombs of charge pass a point in 5 seconds, the value of current is:

25. 
In an induction motor:

26. 
Some materials emit electrons to a light source. These are:

27. 
A resistor colour coded Brown, Red, Red, Silver the value is:

28. 
The negative plate of a discharged NiCad battery would be coated with?

29. 
Through which material will magnetic lines of force pass the most readily?

30. 
The power factor of an alternating current circuit is:

31. 
Capacitor is a device used to

32. 
The two factors which govern the output frequency of an AC generator are the:

33. 
Hysteresis losses are much:

34. 
In a star connected system, the phase voltage is:

35. 
Strength of the electric field is

36. 
The maximum instantaneous value measured from zero value is known as?

37. 
An 8microF capacitor is connected in series with a 0.5 megaohm resistor. The DC voltage supply is 200V. Calculate the time constant.

38. 
In accordance with Faraday’s Laws, the three prime factors affecting generated emf are:

39. 
A 40ohm resistor is connected to a 200 volt supply. The resultant power dissipated is:

40. 
The voltage rating on a capacitor is the:

41. 
The inductance in a coil will decrease:

42. 
Three capacitors having a capacitance equal to 2F, 4F and 6F are connected in parallel. Calculate the effective parallel.

43. 
The specific gravity of the electrolyte in a:

44. 
What is the correct relation between the peak value and peak to peak value for a sinusoidal waveform?

45. 
The aircraft power supply frequency is 400 hertz. The period is:

46. 
A battery of 18V with an internal resistance of 1.5Ω is connected in a circuit with three resistors in parallel of values 6Ω, 12Ω and 12Ω. The total circuit resistance is:

47. 
High torque low speed is given by:

48. 
Three resistors of equal value connected in parallel in a circuit. If one of the resistors becomes an open circuit, the current through the circuit will:

49. 
If an EMF (Electromotive Force) of 120V is applied to a circuit of three equal value resistors in series and a current of 2A flows, the value of total resistance is:

50. 
If the current through x ohm resistance in the circuit is 5A, find the value of x

51. 
An electromagnet of resistance 16ohm requires a current of 1.5A, the voltage required is:

52. 
A material with a high value of resistivity:

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