NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1130 - 1133 of 2320

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Question number: 1130

» Atoms and Nuclei » Bohr Model

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MCQ▾

Question

In the Bohr model of a hydrogen atom, the centripetal force is furnished by the coulomb attraction between the proton and the electron. If a 0 is the radius of the ground state orbit, m is the mass, e is the charge on the electron and s 0 is the vacuum permittivity, the speed of the electron is

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 1131

» Properties of Solids & Liquids » Heat Transfer » Convection

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MCQ▾

Question

A wall is made up of two layers A and B. The thickness of the two layers is the same, but materials are different. The thermal conductivity of A is double than that of B. In thermal equilibrium the temperature difference between the two ends is 36°C. Then the difference of temperature at the two surfaces of A will be

Choices

Choice (4)Response

a.

12°C

b.

6°C

c.

18°C

d.

24°C

Question number: 1132

» Wave Optics » Interference

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MCQ▾

Question

Consider interference between waves from two sources of intensities are I & 4I. Find intensities at points where the phase difference is .

Choices

Choice (4)Response

a.

3I

b.

I

c.

5I

d.

4I

Question number: 1133

» Thermodynamics » Concept of Temperature

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MCQ▾

Question

In the following P-V diagram two adiabatic cut two isothermals at temperatures T 1 and T 2 (figure). The value of will be

The P-V diagram and rectangle abcd formed

The P-V Diagram and Rectangle Abcd Formed

Choices

Choice (4)Response

a.

b.

c.

d.

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