A mercury thermometer has a glass bulb of interior volume at

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

Problem

A mercury thermometer has a glass bulb of interior volume

0.100 \text{ cm}^3

10^\circ\text{C}

. The glass capillary tube above the bulb has an inner cross-sectional area of

0.012 \text{ mm}^2

. The coefficient of volume expansion of mercury is

1.8 \times 10^{-4} \text{ K}^{-1}

. If the expansion of the glass is negligible, how much will the mercury rise in the capillary tube when the temperature rises from

5^\circ\text{C}

35^\circ\text{C}

if the bulb was full at

5^\circ\text{C}

? (a) 0.45 mm (b) 4.5 mm (c) 45 mm (d) 45 cm