GATE PH topic:applied-physics PYQs & Answers — Page 8

Questions 71–80 of 650. Imported answers require independent review unless marked reviewed.

“Why do they pull down and do away with crooked streets, I wonder, which are my delight, and hurt no man living? Every day the wealthier nations are pulling down one or another in their capitals and their great towns: they do not know why they do it; neither do I. It ought to be enough, surely, to drive the great broad ways which commerce needs and which are the life-channels of a modern city, without destroying all history and all the humanity in between: the islands of the past.”

(From Hilaire Belloc’s “The Crooked Streets”)

Based on the information provided in the above passage, which one of the following statements is true?

Your answerChoose one option.

The author of the passage takes delight in wondering.

The wealthier nations are pulling down the crooked streets in their capitals.

In the past, crooked streets were only built on islands.

Great broad ways are needed to protect commerce and history.

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Rohit goes to a restaurant for lunch at about 1 PM. When he enters the restaurant, he notices that the hour and minute hands on the wall clock are exactly coinciding. After about an hour, when he leaves the restaurant, he notices that the clock hands are again exactly coinciding. How much time (in minutes) did Rohit spend at the restaurant?

Your answerChoose one option.

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A color model is shown in the figure with color codes: Yellow (Y), Magenta (M), Cyan (Cy), Red (R), Blue (Bl), Green (G), and Black (K).

Which one of the following options displays the color codes that are consistent with the color model?

Color model diagram:

Your answerChoose one option.

Diagram for Physics question 8 (figure 2)

Diagram for Physics question 8 (figure 3)

Diagram for Physics question 8 (figure 4)

Diagram for Physics question 8 (figure 5)

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A circle with center at

and radius

intersects with another circle with center at

and radius

at two points. One of the points of intersection

is:

Your answerChoose one option.

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An object is said to have an

-fold rotational symmetry if the object, rotated by an angle

, is identical to the original.

Which one of the following objects exhibits 4-fold rotational symmetry about an axis perpendicular to the plane of the screen?

Note: The figures shown are representative.

Your answerChoose one option.

Diagram for Physics question 10 (figure 2)

Diagram for Physics question 10 (figure 3)

Diagram for Physics question 10 (figure 4)

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For a two-dimensional hexagonal lattice with lattice constant

, the atomic density is

Your answerChoose one option.

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Consider a crystal that has a basis of one atom. Its primitive vectors are

, where

are the unit vectors in the

and

directions of the Cartesian coordinate system and

is a positive constant. Which one of the following is the correct option regarding the type of the Bravais lattice?

Your answerChoose one option.

It is BCC and the volume of the primitive cell is

It is FCC and the volume of the primitive cell is

It is BCC and the volume of the primitive cell is

It is FCC and the volume of the primitive cell is

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A particle of mass

is in a potential

for

and

for

, where

is the angular frequency. The ratio of the energies corresponding to the lowest energy level to the next higher level is

Your answerChoose one option.

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A particle is scattered from a potential

, where

is a positive constant. Using the first Born approximation, the angular

dependence of differential scattering cross section

Your answerChoose one option.

Independent of

but dependent on

Dependent on

but independent of

Dependent on both

and

Independent of both

and

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The Joule-Thomson expansion of a gas is

Your answerChoose one option.

Isentropic

Isenthalpic

Isobaric

Isochoric

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GATE PH topic:applied-physics PYQs

Question 6

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Question 8

Question 9

Question 10

Question 11

Question 12

Question 13

Question 14

Question 15