Question

Describe in terms of energy stores and transfers what happens when you a)use a torch b)generate electricity using coal to run a cooker c)generate electricity using wind to run a motor

Answer 1

a) When you use a torch, the chemical energy stored in the batteries is converted into electrical energy, which is then transferred to the bulb in the form of light energy and heat energy.

b) When you generate electricity using coal to run a cooker, the chemical energy stored in the coal is converted into thermal energy (heat) through combustion. This thermal energy is then transferred to the cooker, where it is used to cook food.

c) When you generate electricity using wind to run a motor, the kinetic energy of the wind is transferred to the blades of the wind turbine, causing them to rotate. This rotational kinetic energy is then converted into electrical energy through the generator in the wind turbine.