Resistance

Use circuit diagrams to set up and check appropriate circuits to investigate the factors that affect the resistance of an electrical circuit.

Materials

Consider exploring your options by using a variety of equipment, including those shown above.

Process

1. Attach a crocodile clip to one end (the zero end) of the wire.

2. Attach the other crocodile clip to the wire at a first specified length.

3. Vary the length of wire by moving this crocodile clip and record the length of wire, current and potential difference.

Process

1. Use two resistors of the same value.

2. Connect them into the two circuits shown below.

3. Measure the voltage across the resistors and the current through them (placing the meters in the positions shown in the circuit diagrams)

4. Calculate the total resistance of the circuit.

A
B

Compare the total resistance in the circuit when connecting the resistors in series and in parallel.