AIM: To determine the equivalent resistance of a circuit.

                                    Figure  2

1. Connect the circuit as shown in Figure 1.
2. Ask the Supervisor to check the circuit connection.
3. Copy Table 2 into your answer booklet.

Table 1

Voltmeter reading (V)	Ammeter reading (mA)
3.0
4.5
6.0
7.5
9.0
12.0

1.  Close switch S1.
2.  Adjust the power supply to obtain a reading of 3 V.
3.  Read and record the readings of the ammeter and voltmeter as in Table 2.
4.  Repeat steps (e) and (f) for the other voltage values in Table 2.
5.  Plot a graph of voltage (V) on the y-axis against current (I) on the x-axis.
6.  Determine the slope (L2) of the graph.

 Evaluate: 100 (1- )% .