NEET (National Eligibility cum Medical Entrance Test) Physics: Questions 1457 - 1461 of 2142

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Question number: 1457

» Wave Optics » Diffraction Due to a Single Slit Width of Central Maximum

MCQ▾

Question

Width of slit is 0.3 mm Fraunhofer diffraction is observed in focus plane of lens of a lens of focal length 1 m. If third minima is at 5 mm distance from central maxima, then wavelength of light is-

Choices

Choice (4) Response

a.

5000 Å

b.

7000 Å

c.

6500 Å

d.

6000 Å

Question number: 1458

» Kinetic Theory of Gases » Kinetic Energy and Temperature

MCQ▾

Question

The pressure P, volume V and temperature T of a gas in the jar A and the other gas in the jar B at pressure 3 P, volume Equation and temperature 3T, then the ratio of the number of molecules in the jar A and B will be

Choices

Choice (4) Response

a.

4: 1

b.

1: 1

c.

1: 2

d.

6: 1

Question number: 1459

» Kinetic Theory of Gases » Kinetic Energy and Temperature

MCQ▾

Question

Under which of the following conditions is the law PV = RT obeyed most closely by a real gas?

Choices

Choice (4) Response

a.

High pressure and high temperature

b.

Low pressure and low temperature

c.

High pressure and low temperature

d.

Low pressure and high temperature

Question number: 1460

» Thermodynamics » Laws of Thermodynamics » First Law of Thermodynamics

MCQ▾

Question

The specific heat of hydrogen gas at constant pressure is Equation and at constant volume is Equation . If two kilogram hydrogen gas is heated from 10°C to 30°C at constant pressure, the external work done on the gas to maintain it at constant pressure is

Choices

Choice (4) Response

a.

5 ⨯ 10 3 Cal

b.

4 × 10 3 Cal

c.

4 × 10 5 Cal

d.

4 × 10 4 Cal

Question number: 1461

» Thermodynamics » Concept of Temperature

MCQ▾

Question

Helium at 27° has a volume of 27 litres. It is suddenly compressed to a volume of 1 litre. The temperature of the gas will be Equation

Choices

Choice (4) Response

a.

9327°C

b.

2700°C

c.

1200°C

d.

108°C

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