NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1469 - 1473 of 2320

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Question number: 1469

» Kinetic Theory of Gases » Kinetic Energy and Temperature

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MCQ▾

Question

The root mean square velocity of a gas molecule of mass m at a given temperature is proportional to

Choices

Choice (4)Response

a.

2

b.

c.

d.

Question number: 1470

» Atoms and Nuclei » Mass-Energy Relation

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MCQ▾

Question

If mass equivalent to one mass of electron is completely converted into energy then determine the energy liberated.

Choices

Choice (4)Response

a.

0.51 MeV

b.

2.12 MeV

c.

1.51 MeV

d.

3.12 MeV

Question number: 1471

» Thermodynamics » Concept of Temperature

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MCQ▾

Question

Eight moles of an ideal gas performs a cycle shown in figure. If the temperature T A = 1200 K, T B = 1600 K, T c = 4400 K and T D = 2400 K, the work done per

System of ideal gas – Trapezoid ABCD

System of Ideal Gas – Trapezoid ABCD

Choices

Choice (4)Response

a.

160 KJ

b.

106 kJ

c.

139 kJ

d.

120 kJ

Question number: 1472

» Thermodynamics » Concept of Temperature

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MCQ▾

Question

A Carnot engine whose low temperature reservoir is at 7 C has an efficiency of 50%. It is desired to increase the efficiency to 70%. By how many degrees should the temperature of the high temperature reservoir be increased?

Choices

Choice (4)Response

a.

560 K

b.

280 K

c.

840K

d.

380K

Question number: 1473

» Thermodynamics » Laws of Thermodynamics » First Law of Thermodynamics

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MCQ▾

Question

A system is given 200 calories of heat and it does 600 joules of work. The internal energy of the system change in this process is (J = 4.18 Joule/cal)

Choices

Choice (4)Response

a.

-300 Joule

b.

236 Joule

c.

236.5 Joule

d.

- 236 Joule

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