Cells and Simple Circuits

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

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

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

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

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

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

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

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9. What is an electric current?

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

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

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

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

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

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

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16. Why is Graphite a poor conductor of electricity?

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

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18. Mention 2 types of circuits?

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19. Why are secondary cells called storage cells?

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

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21. What is polarization in a primary cell?

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22. Define local action?

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

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

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26. 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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27. Electric current is the rate of flow of charges?

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28. Why are metals good conductors of electricity?

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

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30. SI UNIT of current is?

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31. Mention the 2 types of chemical cells

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

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

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

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

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

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

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38. Mention the 2 types of conductors

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39. How does a depolarizer work?

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

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

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

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43. What increases Local action?

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44. How are secondary cells recharged?

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

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

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

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

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

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

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

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

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53. Mention 2 defects of a primary simple cell

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

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

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