NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1532 - 1536 of 2320

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Question number: 1532

» Kinetic Theory of Gases » Work Done on Compressing a Gas

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Question

1 7 calories of heat are required to raise the temperature 2 moles of an ideal gas at constant pressure from 30°C to 35°C The amount of heat required to rise the temperature of same gas through the same range (30° C to 35° C) at constant volume (R = 2 Cal/mole K)

Choices

Choice (4)Response

a.

30 Cal

b.

50 Cal

c.

70 Cal

d.

450 Cal

Question number: 1533

» Thermodynamics » Concept of Temperature

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Question

Efficiency of a Carnot engine is 50 % when temperature of outlet is 500 K. In order to increase efficiency up to 60 % keeping temperature of intake the same what will be temperature of outlet

Choices

Choice (4)Response

a.

800 K

b.

600 K

c.

400 K

d.

200 K

Question number: 1534

» Kinetic Theory of Gases » Equation of State of a Perfect Gas

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Question

Gas at a pressure P 0 is contained in a vessel. If the mass of all the molecules are halved and their speeds an doubled, the resulting pressure p will be equal to

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 1535

» Atoms and Nuclei » Mass-Energy Relation

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Question

Energy of each photon obtained in the pair production process will be, if the mass of electron or positron is a. m. u-

Choices

Choice (4)Response

a.

0.213 MeV

b.

0.321 MeV

c.

0.465 MeV

d.

0.123 MeV

Question number: 1536

» Atoms and Nuclei » Radioactive Decay Law

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Question

Half-life of Bi 210 is 5 days. If we start with 50,000 atoms of this isotope, the number of atoms left over after 10 days is

Choices

Choice (4)Response

a.

5,000

b.

12,500

c.

25,000

d.

20,000

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