Investigating the efficiency of a lamp using the specific heat capacity of water @CLEAPSS
Investigating the efficiency of a lamp using the specific heat capacity of water @CLEAPSS
Uploaded April 2017 | Updated September 2026, 2 weeks ago
An interesting investigation which involves using an electric lamp to heat water. By measuring the temperature rise over time, and the voltage and current input to the lamp, the overall efficiency of the lamp can be calculated.

This is linked to CLEAPSS Guide PP043
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Investigating the efficiency of a lamp using the specific heat capacity of water

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