Question

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

Answer 1

The resistor decreases the current in the wire/circuit.

The Electricity from source without resistor was I but after passing through resistor it became i.

So the power from the source was PIt and after connecting resistor it became Pit.

so energy loss PIt -Pit =Pt(I-i).

This energy converts into heat.

Answer 2

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. 1
iii. According to the law of conservation of energy decrease in kinetic
energy gets converted into heat.