AIM: To determine the equivalent resistance of a circuit.

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

 

Table 2          

Source voltage, Vs(V)	Ammeter reading (mA)	Voltmeter reading (V)
5
10
15
20
25

 

 

 

 

1.   Close switch S3.
2.   Adjust the source voltage, Vs to 5V.
3. Read and record in Table 2 the ammeter and voltmeter readings.
4. Open switch S3.
5. Repeat steps (d) to (g) by increasing the source voltage, Vs to 10 V, 15 V,

20 V and 25 V.

1. Plot a graph of V(V) on the vertical axis against I (mA) on the horizontal axis.

1.   Determine from the graph, the equivalent resistance of the circuit.