GATE PH topic:physics PYQs & Answers — Page 33

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Questions 321–330 of 650. Imported answers require independent review unless marked reviewed.

Topic practice 650 questionsPage 33 of 65

Two identical particles of rest mass

approach each other with equal and opposite velocity

, where

is the speed of light. The total energy of one particle as measured in the rest frame of the other is

. The value of

is ______________ (Round off to two decimal places)

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In an X-Ray diffraction experiment on a solid with FCC structure, five diffraction peaks corresponding to (111), (200), (220), (311) and (222) planes are observed using 1.54 Å X-rays. On using 3 Å X-rays on the same solid, the number of observed peaks will be ______________

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For 1 mole of Nitrogen gas, the ratio

of entropy change of the gas in processes (I) and (II) mentioned below is ______________ (Round off to one decimal place)

(I) The gas is held at 1 atm and is cooled from 300 K to 77 K.

(II) The gas is liquified at 77 K.

(Take

, Latent heat

)

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Frequency bandwidth

of a gas laser of frequency

Hz is

where

at room temperature and

is the atomic mass of the lasing atom. For

laser (wavelength = 633 nm),

Hz. The value of

is ________ (Round off to one decimal place)

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A current of 1 A is flowing through a very long solenoid made of winding density 300 turns/m. As shown in the figure, a parallel plate capacitor, with plates oriented parallel to the solenoid axis and carrying surface charge density

, is placed at the middle of the solenoid. The momentum density of the electromagnetic field at the midpoint

of the capacitor is

. The value of

is ______________ (Round off to the nearest integer)

(speed of light

)

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(i) Arun and Aparna are here. (ii) Arun and Aparna is here. (iii) Arun’s families is here. (iv) Arun’s family is here. Which of the above sentences are grammatically CORRECT?

Your answerChoose one option.

(i) and (ii)

(i) and (iv)

(ii) and (iv)

(iii) and (iv)

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The mirror image of the above text about the X-axis is

Your answerChoose one option.

PHƎ⅃AXIS

bHƎ⅃AXIS

dHƎ⅃AXIS

bHƎ⅃AXIS

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Two identical cube shaped dice each with faces numbered 1 to 6 are rolled simultaneously. The probability that an even number is rolled out on each die is:

Your answerChoose one option.

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⊕ and ⊙ are two operators on numbers

and

such that

, and

Then,

Your answerChoose one option.

-26

-33

-40

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Four persons P, Q, R and S are to be seated in a row. R should not be seated at the second position from the left end of the row. The number of distinct seating arrangements possible is:

Your answerChoose one option.

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GATE PH topic:physics PYQs

Question 61

Question 62

Question 63

Question 64

Question 65

Question 1

Question 2

Question 3

Question 4

Question 5