Cells and Simple Circuits

1. Which of the following is NOT a disadvantage of the alkaline accumulator over Lead-acid accumulator?

Question 1 of 55

2. A battery is two or more cells connected together?

Question 2 of 55

3. What are the effects of polarization in a primary cell?

Question 3 of 55

4. What will happen if cell A which has E.M.F of 3.0 V is connected in parallel to another cell which has an E.M.F of 1.5V?

Question 4 of 55

5. Which of the following is not among the uses of electrical energy?

Question 5 of 55

6. Why are metals good conductors of electricity?

Question 6 of 55

7. Materials which allow electric charges to pass through them are called?

Question 7 of 55

8. What type of circuit does not allow charges to move or stops the charges flowing?

Question 8 of 55

9. Mention the 2 types of chemical cells

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10. Why are secondary cells called storage cells?

Question 10 of 55

11. A chemical cell which cannot be renewed once the chemical cells are exhausted is called?

Question 11 of 55

12. How are secondary cells recharged?

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13. In a primary cell the least reactive metal will lose electrons and become negative ion?

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14. What increases Local action?

Question 14 of 55

15. Which of the following is NOT among the maintenance procedures of an accumulator?

Question 15 of 55

16. Why do bubbles accumulate (polarization) around the least reactive metal of primary cell?

Question 16 of 55

17. How do you minimize polarization in a primary cell?

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18. How does a depolarizer work?

Question 18 of 55

19. SI UNIT of current is?

Question 19 of 55

20. Potential difference is measured in volts by an instrument called?

Question 20 of 55

21. Which of the following formulas is used to calculate the amount of current flowing in a circuit given the charge?

Question 21 of 55

22. What are the main reasons which cause an open circuit?

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23. A chemical cell which can be renewed once the chemical cells are exhausted is called?

Question 23 of 55

24. Direction of charges in a chemical cell is opposite the direction of electron flow?

Question 24 of 55

25. When 2 or more cells are connected such that the positive terminals of one is joined to the negative terminal of another one, they are said to be connected in?

Question 25 of 55

26. Semiconductors are materials whose electrical properties lie between conductors and insulators?

Question 26 of 55

27. Which of the following is not a source of electricity?

Question 27 of 55

28. What determines the current-carrying capacity in a Lead acid accumulator?

Question 28 of 55

29. Electric current is the rate of flow of charges?

Question 29 of 55

30. What is the main principle of selecting a metal plate to be used in a primary cell?

Question 30 of 55

31. What type of circuit allows charges to move in a complete path?

Question 31 of 55

32. Which of the following statements is TRUE about when cells are connected in series?

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33. Mention 2 defects of a primary simple cell

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34. Mention the 2 types of conductors

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35. Cells in parallel connection should have IDENTICAL E.M.F or otherwise one will drain the other?

Question 35 of 55

36. In a primary cell the most reactive metal will lose electrons and become positive ion?

Question 36 of 55

37. Which of the following statements is TRUE about when cells are connected in parallel?

Question 37 of 55

38. Which of the following is not an example of a secondary cell?

Question 38 of 55

39. What is the difference between E.M.F and potential difference?

Question 39 of 55

40. What is polarization in a primary cell?

Question 40 of 55

41. Why is Graphite a poor conductor of electricity?

Question 41 of 55

42. How do you prevent short circuiting in a Lead acid accumulator?

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43. Why do operations in ships prefer alkaline accumulator over Lead-acid accumulator?

Question 43 of 55

44. Mention 2 types of circuits?

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45. What is an electric current?

Question 45 of 55

46. Which of the following is not among the maintenance procedures of accumulators?

Question 46 of 55

47. When 2 or more cells are connected such that the positive terminal of one is connected to the positive terminal of the other, while the negative terminal of one is connected to the negative terminal of the other; they are said to be connected in?

Question 47 of 55

48. Which of the following is not a conductor of electricity?

Question 48 of 55

49. Define local action?

Question 49 of 55

50. The MAIN advantage of parallel connection of cells is that current is supplied for a longer time?

Question 50 of 55

51. Chemical cells are cells which provide E.M.F as a result of a chemical reaction?

Question 51 of 55

52. Which of the following statements is correct concerning electrical devices which are connected in series?

Question 52 of 55

53. Voltage is directly proportional to current so long as resistance is kept constant?

Question 53 of 55

54. Which of the following statements is correct concerning electrical devices which are connected in parallel?

Question 54 of 55

55. Why do bulbs connected in parallel light brighter than the ones connected in series?

Question 55 of 55