The heating element in an electric kettle is usually located near the bottom of the kettle because

A. water is a good conductor of heat
B. heat can be more quickly radiated to all parts of the water
C. no heat can be lost to the surroundings
D. the convectional currents which are set up can carry heat to all parts of the water  
E. the molecules of the heating element can carry heat to all parts of the water.

Show Answer Show Explanation

Correct Answer: D