The breaking stress for a wire of unit cross-section is called

Options

A. yield point
B. elastic fatigue
C. tensile strength
D. Young's modulus

Explanation

To solve the question, "The breaking stress for a wire of unit cross-section is called," we need to analyze the options provided and understand the concepts related to stress and materials.

### Step-by-Step Solution:

1. **Understanding Breaking Stress**:
- Breaking stress is defined as the maximum stress that a material can withstand while being stretched or pulled before failing or breaking. It is measured in units of force per unit area (e.g., Pascals or N/m²).

2. **Identifying the Correct Term**:
- The question asks for the term that describes the breaking stress specifically for a wire of unit cross-section. This term is commonly known as "tensile strength."

3. **Reviewing Other Options**:
- **Yield Point**: This refers to the stress at which a material begins to deform plastically. It is not the breaking stress but rather the point before permanent deformation occurs.
- **Elastic Fatigue**: This refers to the gradual weakening of a material due to repeated loading and unloading cycles. It is not related to the breaking stress.
- **Young's Modulus**: This is a measure of the stiffness of a solid material and is defined as the ratio of tensile stress to tensile strain. It is not related to breaking stress.

4. **Conclusion**:
- Since the breaking stress for a wire of unit cross-section is defined as the maximum stress it can withstand before breaking, the correct answer is **tensile strength**.

### Final Answer:
The breaking stress for a wire of unit cross-section is called **tensile strength**.

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