Consider the following statements:

1. Assertion (A): The temperature of a metal wire rises when an electric current is passed through it.
2. Reason (R): Collision of metal atoms with each other releases heat energy.

Select the correct answer using the code given below:

1. Both A and R are true, and R is the correct explanation of A
2. Both A and R are true, but R is NOT the correct explanation of A
3. A is true, but R is false
4. A is false, but R is true

Explanation

Option (c) is correct

• When electric current flows through a metal wire, some electrical energy is converted into heat due to resistance, causing the wire’s temperature to rise (Joule heating).
• Reason is false: heat is not produced by collisions between metal atoms. It occurs because moving electrons collide with lattice ions, transferring energy to the lattice and increasing its vibrational energy, which raises the temperature.

Answer: (c) A is true, but R is false