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

2. 
What will happen to the frequency if the number of revolutions increases?

3. 
The primary of a transformer is supplied with 200V. In the secondary a current of 1A flows through a load of 10 ohms. Assuming 100% efficiency, what is the turns ratio?

4. 
When comparing 2 alternating current waveforms, one is at its maximum value while the other is at zero. The two waveforms are:

5. 
If in an alternating current circuit, resistance is 5 ohm, capacitive reactance is 12 ohm, what is the impedance?

6. 
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:

7. 
What is the maximum number of Electrons in the N shell of an Atom?

8. 
The circuit shown represents a:

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9. 
A component is required to give a negative temperature coefficient value. It is likely to be made of:

10. 
A charge of 12 coulombs moves past a given point in 2 seconds. Intensity of the charge flow in amps is:

11. 
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

12. 
The maximum variation between the maximum positive and the maximum negative value is known as?

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

14. 
Inductance is _____________________ to number of turns in the coil.

15. 
What happens to the current in the series circuit if the resistance is doubled?

16. 
A charge of 36 coulombs moves passed a point in 3 seconds. The flow in amps is:

17. 
If a length of wire is cut in half and the two halves connected in parallel the resistance is”

18. 
A current of 5A flows for 2 minutes how many coulombs passed a point in the circuit?

19. 
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:

20. 
In shaded pole induction motor if the supply current is reversed the motor will:

21. 
The power factor of an alternating current circuit is:

22. 
A voltage across a series resistor circuit is proportional to?

23. 
A sine-wave voltage has a peak value of 180 volts. What is its value at 30°?

24. 
The dielectric in a capacitor is

25. 
What is the total capacitance when two capacitors C1 and C2 are connected in series?

26. 
In a thermocouple, the EMF is produced by:

27. 
Strength of the electric field is

28. 
If 35 coulombs of charge pass a point in 5 seconds, the value of current is:

29. 
If four Identical cells of 2.2 volt and 15 amp/hour (A/H) capacity are connected in series the voltage and A/H will be:

30. 
In an RLC circuit, the power factor is always

31. 
If the time constant for a capacitor is 10us the time taken for the to reach the fully charged condition is approximately:

32. 
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:

33. 
A coil induces 200 mV when the current changes at the rate of 1 amp per second. The inductance L is:

34. 
The state of charge of a lead/acid battery may be determined from the electrolyte:

35. 
Resonance frequency occurs when

36. 
Through which material will magnetic lines of force pass the most readily?

37. 
In a parallel network of resistors which are unequal the current is:

38. 
Diamagnetic materials have a permeability of:

39. 
The inductance in a coil will decrease:

40. 
N capacitors having capacitance C are connected in series, calculate the equivalent capacitance.

41. 
When the current in circuit increases, Lenz’s law says that the self-induced voltage will:

42. 
Capacitor blocks__________ after long time.

43. 
Capacitor is a device used to

44. 
Wattless power is seen in:

45. 
Two 10V 20AH batteries are connected in parallel and connected across a 10Ω load. How long could they supply the required load current before the voltage began to decay?

46. 
Ohms Law states if the temperature stays constant the:

47. 
A potentiometer is a:

48. 
A capacitor will store quadrupled the applied charge when the:

49. 
Battery cells are connected in parallel to:

50. 
When a lead acid battery is fully charged the plate material and electrolyte states are:

51. 
Hysteresis losses are much:

52. 
The field strength of a direct current shunt motor on constant load is reduced, what is the effect on speed and torque?

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