The candidates were expected to connect the circuit as shown in Figure 1, measure and record in Tables 2 and 3 the expected readings. They were also required to evaluate some quantities and do some comparisons.
The expected answers were:
(c) Table 2
VS = 5 V
Quantity |
Measured value |
RT |
2174 Ω |
Total current, IT |
2.30 mA |
Supply voltage |
5V |
VR3 |
2.25 V |
VR4 |
2.75 V |
Table 3
VS = 10 V
Quantity |
Measured value |
RT |
2.2 kΩ |
Total current, IT |
4.60 mA |
Supply voltage |
10 V |
VR3 |
4.50 V |
VR4 |
5.50 V |
(l) The two voltages are same
(m) The two resistances are same
Candidates did well in this question. Majority of them obtained more accurate readings than in Question 1.