Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test Physics Thermal Properties of Matter Thermal expansion
A copper rod and a steel rod are to have lengths LC and LS, such that the difference between their lengths is the same at all ambient temperatures. If the coefficients of linear expansion of copper and steels are αC and αS respectively. The lengths are related to the coefficient of linear expansion as :
1
\(\rm \frac{L_C}{L_S}=\frac{\alpha_S}{\alpha_C}\)
2
LC - LS = αC - αS
3
\(\rm \frac{L_C}{L_S}=(\frac{\alpha_C}{\alpha_S})^{1/2}\)
4
More than one of the above
5
None of the above