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Form 1 Physics Topical Questions and Answers on Cells and Simple Circuits

Form 1 Physics Topical Questions and Answers on Cells and Simple Circuits

Lessons (15)

• 1.    State two advantages of an alkaline battery over a lead acid battery.
  0m 47s

• 2.    A current of 0.5A flows in a circuit. Determine the quantity of charge that crosses a point in 4 minutes.
  1m 10s

• 3.    A car battery requires topping up with distilled water occasionally. Explain why this is necessary and why distilled water is used.
  0m 55s

• 4.    State one advantage of an alkaline accumulator over a lead-acid accumulator.
  0m 43s

• 5.    Explain how polarization reduces current in a simple cell.
  0m 52s

• 6.    State one advantage of a lead-acid accumulator over a nickel-iron (NiFe) accumulator.
  0m 20s

• 7.    State the purpose of Manganese dioxide in a dry cell
  0m 33s

• 8.    Figure 10 show two circuits in which identical dry cells and identical bulbs are used. a). Explain why the bulb in Figure 10 (b) will be brighter than each of the bulbs in Figure 10 (a). b).Give the reason why the cells in Figure 10(b) can be used for a longer period than the cells in Figure 10 (a).
  1m 37s

• 9.    The figure below shows the features of a dry cell (Leclanche"). a). State the polarities of the parts labeled A and B. b).Name the chemical substance in the parts labelled C and D
  1m 10s

• 10.    State a reason why the caps of the cells of a lead-acid battery are open when charging the battery.
  0m 41s

• 11.    State what is meant by polarization in simple cells.
  0m 20s

• 12.    State the meaning of the term battery.
  0m 13s

• 13.    State a reason why the current produced by a simple cell falls rapidly when cell is being used.
  0m 19s

• 14.    The figure below shows an electrical circuit including three switches, S1, S2, S3 and three identical lamps LI, L2,L3. A constant potential difference is applied across X and Y. i).Other than L1, state the lamp that will light when S1 and S2 are closed. (ii) How does the brightness in L1 in (i) above compare with its brightness when all the switches are closed? (iii) Explain the observation in (ii
  1m 32s

• 15.    The figure below shows the cross-section of a dry cell. Name the parts labeled A and B.
  0m 42s