Question

Read the given statements and select the correct option.

Statement I: The amount of heat produced in a current-carrying wire does not depend on its material.

Statement 2 If a large current passes through the filament of an electric bulb, then the filament may become so hot that it may even melt or break.

• A. Both statements 1 and 2 are true and statement 2 is correct explanation of statement 1
• B. Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1
• C. Statement 1 is true and statement 2 is false.
• D. Statement 1 is false and statement 2 is true

Answer 1

The correct option is D Statement 1 is false and statement 2 is true

We know,

$R=\frac{\rho L}{A}$

$H=i^{2}Rt=i^2\frac{\rho L}{A}t$

It is clear that Heat depends on the material (i.e resistivity).

And also..it depends on the current flow.

If large current flows, large amount of heat is dissipated which may melt the coil too.

Option $\text{D}$ is the correct answer