Properties of Solids & Liquids [NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 169 - 172 of 453

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Question 169

Question MCQ▾

Three rods of the same dimension have thermal conductivities 3K, 2K and K. They are arranged as shown in fig. with their ends at 100°C, 50°C and 20°C. The temperature of their junction is

Three Rod of Same Dimension

Choices

Choice (4)Response

a.

60°C

b.

35°C

c.

50°C

d.

70°C

Edit

Question 170

Question MCQ▾

Flask is filled up to a mark with 40 cc of mercury at 20°C. If the flask and contents are heated to 30°C, how much mercury will be above the mark? (α for glass is 9 × 10-6 /°C and coefficient of real expansion of mercury is 180 × 10-6 /°C

Choices

Choice (4)Response

a.

0.0005

b.

0.8500 cc

c.

0.0153 cc

d.

0.0708 cc

Edit

Question 171

Question MCQ▾

The coefficient of volumetric expansion of mercury is 18 × 10-5 /o C. 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 0°C then the length of the mercury column at 100°C is

Choices

Choice (4)Response

a.

4.5 cm

b.

18.8 mm

c.

7.4 cm

d.

9.2 mm

Edit

Question 172

Question MCQ▾

A glass flask of volume one liter at 0° C is filled, level full of mercury at this temperature. The flask and mercury are now heated to 1000 C. How much mercury will spill out, if coefficient of volume expansion of mercury is and linear expansion of glass is ?

Choices

Choice (4)Response

a.

1.52 cc

b.

21.2 cc

c.

15.2 cc

d.

2.12 cc

Edit