Question

The resistance of a conductor is reduced to half its initial value. In doing so the heating effects in the conductor will become

• A. half
• B. double
• C. one-fourth
• D. four times

Answer 1

The correct option is A

half

Explanation for correct solution:

1. When current flows through a conductor, heat energy is generated in the conductor, which is called the heating effect in a conductor.
2. In a conductor if the resistance offered is more, then more heat will be produced. As $H\propto R$
3. Thus, when the resistance is reduced to half, the heat produced also reduces to half.

Hence, option A is the correct answer.