Question

A metallic wire is stretched in such a way that its new length becomes double its original length. How does its specific heat capacity change?

• A. becomes double
• B. becomes 4 times
• C. becomes \(\frac{1}{2}\)
• D. remains the same

Hint:

Remember to distinguish between intrinsic properties (like density, resistivity, specific heat capacity) which depend only on the material, and extrinsic properties (like mass, volume, resistance) which depend on the amount or shape of the material.

Answer 1

The Correct Option is D

Step 1: Understanding the Question:
The question asks about the change in the specific heat capacity of a metallic wire when it is stretched to twice its original length.
Step 2: Detailed Explanation:
Specific heat capacity is an intrinsic property of a substance. This means it depends on the nature of the material itself (i.e., the type of atoms/molecules and their bonding) and not on the mass, shape, or dimensions of the object.
Properties like resistance, length, and volume are extrinsic properties, as they depend on the size and shape of the object.
When the metallic wire is stretched, its length, cross-sectional area, and resistance will change. However, the material of the wire remains the same. Since specific heat capacity is a characteristic of the material, it does not change.
Therefore, even after being stretched, the specific heat capacity of the metallic wire will remain the same as it was originally.
Step 3: Final Answer:
Stretching the wire changes its physical dimensions but not the substance it is made of. Specific heat capacity is a property of the substance, hence it remains unchanged.