Physics · Thermal Properties of Matter
Two different wires having lengths L1 and L2, and respective temperature coefficients of linear expansion α1 and α2, are joined end-to-end. The effective temperature coefficient of linear expansion of the composite wire is:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1α1α2(L1 + L2)α1L1 + α2L2
- 2α1 + α2
- 3α1L2 + α2L1L1 + L2
- 4α1L1 + α2L2L1 + L2✓
Correct answer
α1L1 + α2L2L1 + L2
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