AIM: To determine how voltages are distributed in resistor circuits according to Ohm’s law.
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- Connect the circuit as shown in Figure 1.
- Ask your supervisor to check the circuit connection.
- Copy Table 1 into your answer booklet.
Table 1
V(V) |
0 |
2 |
4 |
6 |
8 |
10 |
12 |
I(A) |
|
|
|
|
|
|
|
- Close switch S.
- Set the power supply to 0 V.
- Read and record the ammeter reading in Table 1.
- Increase the voltage value in steps of 2 V to 12 V and record the
corresponding ammeter readings in Table 1.
- Plot a graph of voltage V(V) on the vertical axis against current I(A) on
the horizontal axis.
- Determine the slope of the graph.
- Deduce from the graph the value of the unknown resistance X.
The candidates were expected to connect the circuit as shown in Fig.1, measure and record in Table 1 the, voltmeter readings, ammeter readings, plot some graph, determine the slope and unknown resistance from the graph.
