Discussion
Consider a material A has volume expansion coefficient \(\alpha_V = 3.9 \times 10^{-4}\)/°C. The linear expansion coefficient \(\alpha_l\) of the material A is:
Answer: C
For an isotropic solid the volume expansion coefficient is three times the linear coefficient, \(\alpha_V = 3\alpha_l\), because the volume is the product of three lengths and each expands by the same fraction. Hence
\[ \begin{aligned} \alpha_l = \frac{3.9 \times 10^{-4}}{3} \\ &= 1.3 \times 10^{-4}\ /^{\circ}\text{C} \end{aligned} \]The option 3.9 x 10^-4 simply repeats the volume coefficient, 2.6 x 10^-4 corresponds to dividing by 1.5, and 10^-4 does not follow from any relation between the two coefficients.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development