AP EAMCET · PHYSICS · Thermal Properties of Matter
A bimetallic strip is made of aluminium and steel \(\left(\alpha_{\mathrm{Al}}>\alpha_{\text {steel }}\right)\). On heating, the strip will
- A remain straight
- B get twisted
- C bend with aluminium on concave side
- D bend with steel on concave side
Answer & Solution
Correct Answer
(B) get twisted
Step-by-step Solution
Detailed explanation
As we know that, \( \begin{array}{rlrl} \Delta l & =l_0 \alpha \Delta T \\ \Rightarrow & \alpha & =\frac{\Delta l}{l_0 \Delta T} \end{array} \) where, \(\Delta l\) is change in length, \(l_0\) is initial length, \(\Delta T\) is change in temperature and \(\alpha\) is coefficient…
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