Class 10 Science Chapter 12 Extra Questions

In this article, you will find Class 10 Science Chapter 12 Extra QuestionsPhysics. In Class 10 Science Chapter 12 Extra Questions, you will find extra questions for better practice that will help you in your board exams. when you study NCERT class 10 science chapter 12 exercise solutions, you will be able to solve these Class 10 Science Chapter 12 Extra

Class 10 Science Chapter 12 Extra Questions consist topics- electric charge, types of charges, Coulomb’s law, Conductors and insulators, electric current, electric potential and potential difference, electric circuit and its components, Ohm’s law, Resistance and factor affecting resistance, Resistivity, a combination of resistors in the circuit- Parallel combination and series combination, benefits of parallel combination over the series combination, the heating effect of electric current and appliances based on the heating effect of current, etc.

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Class 10 Science Chapter 12 Extra Questions

CHAPTER- 12 –ELECTRICITY

1. Draw the diagram of an electric circuit.

2. What is an electric circuit?

3. How many electrons consist 1-coulomb charge?

4. Calculate the number of electrons consisting of a one-coulomb charge.

5. What are the constituent of alloy Nichrome.

6. Name the component used to regulate current without changing the voltage source.

7. Name the device used to change the resistance in the circuit.

8. What is electric current?

9. Following diagram is showing the flow of electrons in a conductor from point A to B. What is the direction of the flow of current in the conductor?

A e^- B

10. What is the value of the charge on the electron?

11. Name the device that measures electric current in a circuit. How is it connected in the circuit?

12. Name the device that measures potential difference across two points in a circuit. How is it connected in the circuit?

13. Write the difference between ammeter and voltmeter.

14. Draw a schematic diagram of an electric circuit consisting following components-

i. Bulb

ii. Ammeter

iii. Battery

iv. Rheostat

15. What is the potential difference? Give its unit.

16. What is one volt?

17. Name the device that helps to maintain a potential difference across a conductor?

18. What is one coulomb?

19. Draw the symbols used for the components used in an electric circuit.

20. What is Ohm’s law?

21. What do you mean by one Ohm?

22. What is a resistor?

23. What is the characteristic property of the conductor?

24. What is the range of the resistivity of metal and alloys?

25. What is the range of the resistivity of rubber and glass-like substances?

26. Do the resistance and resistivity vary with temperature?

27. Name the metal used for –

i. Filaments of bulbs

ii. Electrical transmission

28. Describe the experiment that proves Ohm’s law.

29. What do you mean by the resistance of a conductor? Write the factors on which the resistance of a conductor depends?

30. What is resistivity?

what is specific resistance? Write the formula and its unit.

31. Why are coils of electric toasters and irons made of an alloy rather than pure metal?

32. What is ammeter and a voltmeter?

33. Establish the formula of total or equivalent resistance of resistors connected in a series combination.

34. Establish the formula of total or equivalent resistance of resistors connected in parallel combination.

35. What is the heating effect of electric current? Write some appliances based on the heating effect of current.

36. Write Joule’s law of heating?

37. Why does the cord of an electric heater not glow while the heating element does?

38. What is power? What is the commercial unit of electrical energy?

39. Change 1 KWh into Joule.

40. Explain the following –

i. Why is the tungsten used almost exclusively for filament of electric lamps?

ii. Why is the series arrangement is not used in domestic circuits?

iii. Why copper and aluminum wires are usually employed for electricity transmission?

41. What do you mean by one Ohm?

42. What are the main constituents of alloy named ‘Nickel”?

43. What is a resistor?

44. What do you mean by a good conductor and a poor conductor?

45. What are the main disadvantages of a series combination of electrical components?

46. What are the main advantages of a parallel combination of electrical components?

47. What is a fuse? How it works?

48. What is a good conductor?

49. What is a poor conductor?

50. Why are nitrogen and argon gases filled in the bulbs?

51. How does an electric fuse protect circuits and appliances?[ Annual exam-2012]

52. A bulb is used for 10hrs/ day. If the electric energy cost is Rs. 4.00 per unit, then calculate the electric expenses for 30 days.[Annual exam-2012]

53. Match the following.[Annual exam-2012]

	Column X	Column Y
1	Electric current measurement apparatus	Joule’s heating effect
2	Electric potential difference measurement apparatus	commercial unit of electric energy
3	IR	resistivity
4	I²RT	Voltmeter
5	Unit (kWh)	Ohm’s law
6	Ohm-meter	Ammeter

54. A 12 Ohm resistance is cut into three equal parts and then connected in triangular form. Determine the equivalent resistance between two ends of any side of the triangle.[Annual exam-2013]

55. Draw a circuit diagram of three resistances connected in a series combination. Derive a formula for equivalent resistance for this combination.[Annual exam-2013]

56. A wire of a given material having length l and area of cross-section A has a resistance of 8 Ohm. Determine the resistance of another wire of the same material having length 2l and area of cross section`frac\{A}{2}?[Annual exam-2013]

57. What are the advantages of connecting electrical devices in parallel in the circuit?

58. Write the difference between series and parallel combinations of resistors.

59. Write the SI units of the following-

i. Electrical charge

ii. Electric current

iii. Potential difference

iv. Resistance

v. Resistivity

vi. Heat

vii. Power

viii. Work

ix. Energy