5f15.10: ENERGY CONVERSION - IMMERSION HEATER

PURPOSE: To demonstrate quantitatively the conversion of electrical energy into heat.

DESCRIPTION: About 300 ml of water is heated in a beaker with a 200-watt immersion heater. Measure the initial water temperature, let the water heat for a fixed time with the immersion heater, and measure the final water temperature. Good to about ten percent.

SUGGESTIONS:

EQUIPMENT: 600 ml glass beaker with 300 ml water, 200 watt immersion heater, and digital thermometer.

SETUP TIME: 30 min.