Cells and Simple Circuits

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

Question 1 of 55

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

Question 2 of 55

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

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

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

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

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7. SI UNIT of current is?

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

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9. Why are metals good conductors of electricity?

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

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

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12. Mention the 2 types of conductors

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

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

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15. What increases Local action?

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16. Define local action?

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

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18. 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?

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

Question 19 of 55

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

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

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22. Why is Graphite a poor conductor of electricity?

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23. 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?

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24. Mention 2 defects of a primary simple cell

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

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

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27. Mention 2 types of circuits?

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

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

Question 29 of 55

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

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

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32. Why are secondary cells called storage cells?

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

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34. How are secondary cells recharged?

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

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

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37. Mention the 2 types of chemical cells

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

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

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40. How does a depolarizer work?

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41. What is polarization in a primary cell?

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

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

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

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

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

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?

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48. What is an electric current?

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

Question 49 of 55

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

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

Question 51 of 55

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

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

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

Question 54 of 55

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

Question 55 of 55