Answer to Question #71587 in Mechanics | Relativity for klaudia

Question

an electric fan heater contains an electric heater and a fan driven by an electric motor
1. describe the energry transferes that takes place in the fan heater when it is operating normaly
2.with reference to the fan heater, explain what is meant by useful energry and wasted energy

Answer 1

1) It is an electric motor when we use electrical energy to get kinetic energy.
It is an electric generator when we use kinetic energy to get electrical energy.
An electric motor uses electrical energy and a magnetic field to create motion as the interaction of the magnetic field and electric current exerts a magnetic force. As this force creates movement then the electrical energy is converted into the kinetic energy.
2) Electricity is consumed, and heat is useful.