NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1443 - 1446 of 2320

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Question number: 1443

» Properties of Solids & Liquids » Thermal Expansion

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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.

1.52 cc

b.

21.2 cc

c.

15.2 cc

d.

2.12 cc

Question number: 1444

» Properties of Solids & Liquids » Heat Transfer » Convection

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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.

1.6

b.

3.2

c.

0.1

d.

0.2

Question number: 1445

» Thermodynamics » Laws of Thermodynamics » Zeroth Law of Thermodynamics

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Question

One mole of an ideal gas expands at a constant temperature of 200 K from an initial volume of 10 litres to a final volume of 20 litres. The work done in expanding the gas is

(R = 8.31 J/mole-K)

Choices

Choice (4)Response

a.

1500 Joules

b.

1728 Joules

c.

3456 Joules

d.

750 Joules

Question number: 1446

» Properties of Solids & Liquids » Elastic Behavior

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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.

8.0 × 10 6 erg

b.

8 × 10 6 J

c.

8.1 × 10 6 J

d.

8.1 × 10 6 erg

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