Question

Statement 1 : Electric current ( flow of electrons ) creates heat in the resistor.
Statement 2 : Heat in the resistor is created according to the rule of energy conservation.
Explain Statement 1 with the help of Statement 2.

Answer 1

i. When electrons flows through the resistor (during flowing electric current) electron possesses kinetic energy.
ii. During the flow of electron there is decrease in kinetic energy of electrons due to collision on atoms, ions and molecules. 
iii. According to the law of conservation of energy decrease in kinetic energy gets converted into heat.