NEET Physics: Questions 1131 - 1134 of 2099

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Question number: 1131

» Properties of Solids & Liquids » Heat Transfer » Convection

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.

24°C

c.

6°C

d.

18°C

Question number: 1132

» Wave Optics » Interference

MCQ▾

Question

Consider interference between waves from two sources of intensities are I & 4I. Find intensities at points where the phase difference is π2 .

Choices

Choice (4) Response
a.

I

b.

4I

c.

3I

d.

5I

Question number: 1133

» Thermodynamics » Concept of Temperature

MCQ▾

Question

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

The P-V diagram and rectangle abcd formed

The P-v Diagram and Rectangle Abcd Formed

In above figure we shows that the following P-V diagram two adiabatic cut two isothermals.

Choices

Choice (4) Response
a.

VbVa

b.

VcVb

c.

VbVc

d.

VdVa

Question number: 1134

» Atoms and Nuclei » Bohr Model

MCQ▾

Question

The electron in a hydrogen atom makes a transition n1n2 , where n 1 and n 2 are the principal quantum numbers of two states. Assume the Bohr model to be valid. The time period of the electron in the initial state is eight times that in the final state. Then,

(1) n 1 = 4 (2) n 2 = 2

(3) n 2 = 5 (4) n 1 = 5

Select the correct answers and mark it according to the following codes:

Choices

Choice (4) Response
a.

1, 2 and 3 are correct

b.

1 and 2 are correct

c.

2 and 4 are correct

d.

1 and 3 are correct

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