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. 
A current of 5A flows for 2 minutes how many coulombs passed a point in the circuit?

2. 

3. 
Compensation windings are:

4. 
In the diagram an unknown resistance is being measured using a Wheatstone bridge. The bridge is balanced. The unknown resistance is:

5. 
An ion is:

6. 
What will happen to the frequency if the number of revolutions increases?

7. 
A low value of voltage in a very:

8. 
Conventional current is:

9. 
A 24V source is connected across a 30 Kohm resistor. In order to achieve a current flow of 6mA the resistor must be changed to

10. 
The Electron Valence of an Element with 5 electrons is:

11. 
In a star connected system, the phase voltage is:

12. 
Some materials emit electrons to a light source. These are:

13. 
When a changing pressure is applied to opposite faces of a crystal:

14. 
In a lead acid cell, the specific gravity of the electrolyte:

15. 
A circuit has a resistance of 2 ohms connected in series with a capacitance of 6F. Calculate the discharging time constant.

16. 
Resistance is:

17. 
A 12V battery has an internal resistance of 0.2 ohm. With a 5A load current flowing what is the potential difference of the battery?

18. 
In a wire wound resistor the length of wire is increased by four times and its cross sectional area is doubled. The resistance value is effectively:

19. 
A 3 phase induction motor can be reversed by:

20. 
5 amps passes through a 4 ohm resistor, the amount of power the resistor has to dissipate is:

21. 
In a purely inductive circuit the current:

22. 
Air has a dielectric constant of

23. 
What is the maximum number of Electrons in the N shell of an Atom?

24. 
Inductance is _____________________ to number of turns in the coil.

25. 
The current in a circuit is 6 amps the amount of charge moved in 25 seconds is:

26. 
What is the value of capacitance of a capacitor which has a voltage of 4V and ha 8C of charge?

27. 
The filament of a lamp measures 2.5ohm when cold. With 120 volts applied across the filament, the lamp dissipates 60 Watts. What is the hot resistance of the lamp?

28. 
Siemens is the unit name for:

29. 
Wave and Lap windings are designed to give:

30. 
When two resistors are connected in series:

31. 
The charge of 25 x 10^18 electrons is Approximately:

32. 
When the voltage across a capacitor increases, what happens to the charge stored in it?

33. 
If in an alternating current circuit, impedance is 26 ohm, capacitive reactance is 24 ohm, what is the resistance?

34. 
Capacitance increases with a:

35. 
Remanence is the:

36. 
If the output of a generator drops from 100V with zero current flowing to 80V with 2A flowing then the internal resistance is:

37. 
Calculate the charge in the 2F capacitor

38. 
In the diagram the PD (potential difference) from A to B will be

39. 
A synchronous ac motor is most useful for applications requiring:

40. 
The voltage waveform in an ideal inductance would be:

41. 
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:

42. 
In order to produce a substantial voltage and current from photovoltaic cells they should be connected in:

43. 

44. 
A sine-wave voltage has a peak value of 180 volts. What is its value at 30°?

45. 
The voltage rating on a capacitor is the:

46. 
Flux density is measured in:

47. 
The unit of Siemens with the symbol G is:

48. 
Peak value divided by the rms value gives us?

49. 
One of the laws of magnetism states-'the force between two magnetic poles of constant strength is:

50. 
In accordance with Faraday’s Laws, the three prime factors affecting generated emf are:

51. 
What happens to the current in the series circuit if the resistance is doubled?

52. 
Three capacitors having a capacitance equal to 2F, 4F and 6F are connected in parallel. Calculate the effective parallel.

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