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CGS unit of superfecial expansion is

\(\circ_{C^{-1}}\)
\(\circ_{C^{-2}}\)
\(k^{-1}\)
\(k^{-2}\)

If the initial and final area of a solid plate be \(A_{1}\) and \(A_{2}\) at a temp of \(t_{1}\) and \(t_{2}\) respectively, the coefficient of superficial expansion is

\(A_{2}\) - \(A_{1}\)
\(\frac{A_{2} -A_{1}}{A_{1}}\)
\(\frac{A_{2} -A_{1}}{A_{1}(t_{2} -t_{1})}\)
\(\frac{A_{2} -A_{1}}{(t_{2} -t_{1})}\)

\(k^{-1}\) is the unit of coefficient of

linear expansion
superficial expansion
volume expansion
above all

If the length and bredth of a solid plate be \(L_{1}\) and \(L_{2}\) respectively at a temperature of \(t_{1}\) and those are \(L_{3}\) and \(L_{4}\) at a temperature of \(t_{2}\), then the coefficient of superficial expansion is

\(L_{3}L_{4}-L_{1}L_{2}\)
\(\frac{L_{3}L_{4}-L_{1}L_{2}}{t_{2}-t_{1}}\)
\(\frac{L_{3}L_{4}-L_{1}L_{2}}{L_{1}L_{2}}\)
\(\frac{L_{3}L_{4}-L_{1}L_{2}}{L_{1}L_{2}(t_{2}-t_{1})}\)

Physics

Ten Standard

Test your understanding of this lesson Superficial expansion:-

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