Properties of Solids & Liquids (NEET Physics): Questions 175 - 178 of 190

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Question number: 175

» Properties of Solids & Liquids » Thermal Expansion

MCQ▾

Question

The coefficient of volumetric expansion of mercury is 18 × 10 -5 / o C. A thermometer bulb has a volume 10 -6 m 3 and cross section of stem is 0.004 cm 2. 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.

9.2 mm

b.

4.5 cm

c.

18.8 mm

d.

7.4 cm

Question number: 176

» Properties of Solids & Liquids » Thermal Expansion

MCQ▾

Question

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 100 0 C. How much mercury will spill out, if coefficient of volume expansion of mercury is 1.82 × 10 -4 /°C and linear expansion of glass is 0.1 × l0 -4 /ºC?

Choices

Choice (4) Response

a.

2.12 cc

b.

21.2 cc

c.

15.2 cc

d.

1.52 cc

Question number: 177

» Properties of Solids & Liquids » Heat Transfer » Convection

MCQ▾

Question

A cylindrical rod with one end in a steam chamber and its other end in ice results in melting of 0.1 gm of ice per second. If the rod is replaced by another with half the length and double the radius of the first and if the thermal conductivity of material of second rod is ¼ that of firth, the rate at which ice melts in gm/sec will be

Choices

Choice (4) Response

a.

0.1

b.

1.6

c.

0.2

d.

3.2

Question number: 178

» Properties of Solids & Liquids » Elastic Behavior

MCQ▾

Question

A spring is stretched by 3 cm when a load of 5.4 × 10 6 dyne is suspended from it. Work done will be

Choices

Choice (4) Response

a.

8.1 × 10 6 erg

b.

8.0 × 10 6 erg

c.

8.1 × 10 6 J

d.

8 × 10 6 J

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