GATE PH exam:gate PYQs & Answers — Page 2

Questions 11–20 of 650. Imported answers require independent review unless marked reviewed.

Topic practice 650 questionsPage 2 of 65

In free space, an electromagnetic wave is traveling whose wavevector is

. The electric field component of this electromagnetic wave is given by

. The speed of light in free space is

. The corresponding magnetic field

Your answerChoose one option.

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An infinitely large non-conducting thin sheet in the

plane (

) carries a uniform surface charge density

. The electric field in the region

. Then, the electric field

in the region

will be

(

)

Your answerChoose one option.

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Consider an operator

which is not Hermitian. Find the possible values of

and

such that the operator

is Hermitian.

Your answerChoose one option.

and

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For a scalar field

and a vector field

is equivalent to the expression

Your answerChoose one option.

Null vector

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Which of the following options is correct for transformation of electric field

and magnetic field

under time reversal, i.e.,

Your answerChoose one option.

and

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On a horizontal plane, a projectile of mass

is launched from the ground with speed

at an angle

with the horizontal. In addition to the gravitational force (

), it also experiences a drag force

, where

is its velocity and

is a constant. It hits the ground at a distance

from the point of launch with its velocity making an angle

with the horizontal, as shown schematically in the figure. Then which of the following options is correct?

Your answerChoose one option.

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Consider the Otto cycle for an ideal gas engine consisting of two quasistatic adiabatic and two quasistatic isochoric processes. The correct temperature-entropy (T-S) phase diagram for the cycle is

Your answerChoose one option.

Diagram for Physics question 17 (figure 2)

Diagram for Physics question 17 (figure 3)

Diagram for Physics question 17 (figure 4)

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The formula for energy

of a photon gas at temperature

in a two-dimensional box at equilibrium with

denoting the density of states of photons is given below where symbols

and

have their standard meaning. The specific heat (

) of this photon gas obeys

Your answerChoose one option.

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For the electric field of an electromagnetic wave given below, which of the following statements is correct?

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The electric field is linearly polarized with slope 2.

The electric field is circularly polarized with radius

The electric field is elliptically polarized with a ratio of major to minor axis being 2.

The electric field is unpolarized with the two components being phase shifted by

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A gas of non-interacting

atoms (of mass

) is in a three-dimensional trap whose energy levels can be approximated by those of a harmonic oscillator potential

. The chemical potential of the gas at

K is

Your answerChoose one option.

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GATE PH exam:gate PYQs

Question 11

Question 12

Question 13

Question 14

Question 15

Question 16

Question 17

Question 18

Question 19

Question 20