A square copper plate of side is at

PHYSICS · Single correct · CBSE · Physics · Thermal Properties of Matter · Thermal Properties of Matter

Problem

A square copper plate of side

20\,\text{cm}

is at

20\,^{\circ}\text{C}

. It is heated to

120\,^{\circ}\text{C}

. Given

\beta_{\text{Cu}} = 34\times10^{-6}\,\text{K}^{-1}

, the increase in its area is closest to (a)

2.04\,\text{cm}^2

(b)

0.68\,\text{cm}^2

(c)

1.36\,\text{cm}^2

(d)

2.72\,\text{cm}^2