To demonstrate how wire resistance changes with temperature, set up a circuit with a wire, power supply, ammeter, and voltmeter, observing how current and voltage readings vary with temperature.
Experiment Setup: To demonstrate how the resistance of a wire varies with temperature, set up a circuit with a power supply (cell), an ammeter, a voltmeter, and the wire to be tested. Connect them in series.
Procedure: Heat the wire using a heat source such as a Bunsen burner. Measure the current using the ammeter and the potential difference using the voltmeter as the wire's temperature increases.
Observation: As the temperature rises, you will notice a corresponding increase in resistance, leading to changes in current and voltage readings.
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