1.

The coefficient of volumetric expansion of mercury is 18 × 10?5/ºC. A thermometer bulb has a volume 10?6 m3 and cross section of stem is 0.004 cm2. Assuming that bulb is filled with mercury at 0ºC then the length of the mercury column at 100ºC is                      [Pb. PMT 1998, DPMT 1997, 2001]

A.            18.8 mm                                 
B.            9.2 mm
C.            7.4 cm                                     
D.            4.5 cm
Answer» E.


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