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To see the effect of volume current on the effectiveness of an immersion heater heating 75 cm3 of water.
Member rating: No Rating | Words: | Submitted: Mon Dec 22 2003
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The immersion heater experiment Aim - To see the effect of volume current on the effectiveness of an immersion heater heating 75 cm3 of water. Apparatus: - Immersion Heater Small Beaker Variable resistor Ammeter Voltmeter Thermometer Power pack Variables Input variable Current in circuit Control Variables Volume of liquid Type of liquid Amount of insulation Size/shape of beaker Size/shape of immersion heater Thermometer used Time readings are taken over Start temperature of liquid Output variable Temperature change in 5 minutes Method A small beaker was filled with 75cm3 of water at 24 degrees Celsius. A circuit was made that incorporated an immersion heater, an ammeter, a voltmeter, and a variable resistor. The immersion heater was placed into the beaker of water and the current was set to maximum on the resistor. Two readings were taken for each set of results. Predictions I predict that the current in the circuit will be proportional to the temperature change i.e. as the current is increased the temperature change will increase as well. This is because if the current increases there...
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