Cells and Simple Circuits

1. Mention the 2 types of chemical cells

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

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

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

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

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6. How does a depolarizer work?

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

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

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9. Mention 2 types of circuits?

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

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

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

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13. 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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14. How are secondary cells recharged?

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

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

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17. SI UNIT of current is?

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

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

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

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

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

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

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

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

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27. 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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28. Why is Graphite a poor conductor of electricity?

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

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

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

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

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

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34. Why are metals good conductors of electricity?

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

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

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37. Why are secondary cells called storage cells?

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

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39. Define local action?

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40. Mention 2 defects of a primary simple cell

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

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

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

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44. Mention the 2 types of conductors

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45. What is an electric current?

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46. What is polarization in a primary cell?

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

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

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

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

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

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

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

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54. What increases Local action?

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

Question 55 of 55