Physics · Young's modulus of elasticity of the material of a metallic wire
To determine the Young modulus of a wire, several measurements are taken. In whi
To determine the Young modulus of a wire, several measurements are taken. In which row can the measurement not be taken directly with the stated apparatus?
- A. measurement: area of cross-section of wire apparatus : micrometer screw gauge
- B. measurement: extension of wire ; apparatus: vernier scale
- C. measurement: mass of load applied to wire ; apparatus : electronic balance
- D. measurement: original length of wire ; apparatus metre rule
Step-by-step solution
The area of cross-section is not directly measured by a micrometer screw gauge; the gauge measures the diameter, and the area is calculated from it. In contrast, extension (vernier scale), mass (electronic balance), and original length (metre rule) can be measured directly with the stated apparatus.