Applied Electricity 1, Nov/Dec 2012
 Questions: 1 2 Main
Weakness/Remedies
Strength

Question 1

AAIM: To investigate how current divides between two resistors connected in parallel.

1.   Connect the circuit as shown in Fig. 2.
2.   Ask the supervisor to check the circuit connection.

Table 2

 VS(V) A1(mA) A2(mA) A3(mA) I1(mA) I1(mA) 2 3 5 7 9
1.   Set the power supply to 0 V.
2.   Close switch S2.
3.   Adjust the power supply to 2 V as shown in Table 2.
4.   Read and record the milli-ammeters readings, I1(mA), I2(mA) and I3(mA) in

Table 2.

1.   Open switch S2.
2.   Repeat steps (e) to (h) for other values of Vs(V) as shown in Table 2.
3.   Complete Table 2.
4.   Plot a graph of Vs (V) on the vertical axis against I3(mA) on the horizontal

axis.

1.   Determine the slope of the graph in step (k).

(m) Comment on the value obtained in step (l) with the value of R3.

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Observation

AIM: To investigate how current divides between two resistors connected in parallel.

1.   Connect the circuit as shown in Fig. 2.
2.   Ask the supervisor to check the circuit connection.

Table 2

 VS(V) A1(mA) A2(mA) A3(mA) I1(mA) I1(mA) 2 3 5 7 9
1.   Set the power supply to 0 V.
2.   Close switch S2.
3.   Adjust the power supply to 2 V as shown in Table 2.
4.   Read and record the milli-ammeters readings, I1(mA), I2(mA) and I3(mA) in

Table 2.

1.   Open switch S2.
2.   Repeat steps (e) to (h) for other values of Vs(V) as shown in Table 2.
3.   Complete Table 2.
4.   Plot a graph of Vs (V) on the vertical axis against I3(mA) on the horizontal

axis.

1.   Determine the slope of the graph in step (k).

(m) Comment on the value obtained in step (l) with the value of R3.