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

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## Question number: 1469

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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

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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

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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

### Choices

Choice (4)Response

a.

160 KJ

b.

106 kJ

c.

139 kJ

d.

120 kJ

## Question number: 1472

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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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