Electricity Paper 2 Questions and Answers - Bunamfan Cluster Pre Mock Exam 2022

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INSTRUCTIONS TO CANDIDATES

  • This paper consist of five exercises
  • Answer all the five exercises
  • Each exercise takes 30 minutes


Questions

EXERCISE 1

  1. Using materials, components anmd equipment provided, perform the following tasks.
    1. Connect the circuit in Figure.
      Let the examiner check your work.
    2. Close switch S and adjust the power supply to obtain values of voltage shown in Table 1 for each voltage obtained measure and record in the table the corresponding values of current (6 marks)
      Voltage(V)  1  3  5  7  8  10
      Current I(mA)            
    3. Use the values in Table 1 and draw and draw agraph of current against voltage
    4. Determine the gradient of the graph
    5. Name the quantity expressed by the gradient the graph.

EXERCISE 2

  1. Use the materials , tools and equipment provided to make the battery holder in Figure 2 tools, equipment andf materials provided to make the brackets shown in Figure 2. (20 marks)
    Details of A
    Seam; 10mm wide
    Slot; 50mm from seamed joint

EXERCISE 3

  1. Use the tools, equipment and materials provided to carry out the following tasks.
    1. Terminate the three-core flexible cable to the top plug and the iron box
    2. Turn the thermostat switch to ON position, measure and record the values of resistance between;
      1. Live and Neutral at plug .....Ω
      2. Live and earth at plug .... Ω
      3. Earth at plug and iron box body ...Ω
      4. Neutral at plug and iron box ...Ω

EXERCISE 4

  1. Using the pre-fabricated circuit provided in Figure 3. Perform the following tasks
    1. With the power supply OFF
      1. Connect the milliameter between A and B (Observe the polarity) (1 mark)
      2. Connect the voltmeter between C and D (Observe the polarity). Let the examiner check your work.
    2. with power supply ON.
      Adjust the variable resisror to obtain current values in Table 2 and in each case measure and record the corresponding  values of voltage.
      Table 2
      Voltage(V)  1  3  5  7  8  10
      Current I(mA)            
    3.     
      1. Plot the graph of current against voltage.
      2. Use the graph to determine the value of current when the voltage is 5.0V (7 marks)
        Value

EXERCISE 5

  1. Figure 4 shows the layout of a final circuit. Using PVC sheathed cable wiring system , install the lamps to be controlled by the one way switch.

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