PH-2143
Convection
Physics · Secondary 4 · Hard · Convection
In an electric kettle, the heating element is fixed close to the bottom of the kettle. How does this position help the water to boil more quickly?
- Heated water at the bottom rises and cooler water sinks, setting up convection currents
- Heated water at the bottom becomes denser and stays there, trapping heat
- Heat travels only by radiation through the water, so position is not important
- Conduction through the plastic body of the kettle heats the water evenly
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