Cells and Simple Circuits

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

Question 1 of 55

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

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3. What increases Local action?

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

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

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

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7. Mention 2 types of circuits?

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

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

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10. 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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11. SI UNIT of current is?

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12. Why are metals good conductors of electricity?

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

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

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

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

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

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18. Mention the 2 types of conductors

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

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20. How does a depolarizer work?

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21. Why are secondary cells called storage cells?

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

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

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

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

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

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

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

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

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

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

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32. What is an electric current?

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

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

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

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36. What is polarization in a primary cell?

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

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

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

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41. Define local action?

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

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

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

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45. Why is Graphite a poor conductor of electricity?

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46. Mention the 2 types of chemical cells

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

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

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49. Mention 2 defects of a primary simple cell

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50. How are secondary cells recharged?

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51. 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 51 of 55

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

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

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

Question 54 of 55

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

Question 55 of 55