GATE PH branch:ph PYQs & Answers — Page 16

Questions 151–160 of 650. Imported answers require independent review unless marked reviewed.

Topic practice 650 questionsPage 16 of 65

Atomic numbers of V, Cr, Fe and Zn are 23, 24, 26 and 30, respectively. Which one of the following materials does NOT show an electron spin resonance (ESR) spectra?

Your answerChoose one option.

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A particle is subjected to a potential

Here,

and

. If the energy of the particle

, which one of the following schemas is a valid quantum mechanical wavefunction (

) for the system?

Your answerChoose one option.

Diagram for Physics question 22 (figure 2)

Diagram for Physics question 22 (figure 3)

Diagram for Physics question 22 (figure 4)

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Let

be the phase space density of an ensemble of a system. The Hamiltonian of the system is

. If

denotes the Poisson bracket of

and

, then

implies

Your answerChoose one option.

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Consider the following circuit:

Suppose the input signal

Diagram for Physics question 24 (figure 2)

and the input signal

Diagram for Physics question 24 (figure 3)

Which one of the following output signals is correct?

Your answerChoose one option.

Diagram for Physics question 24 (figure 4)

Diagram for Physics question 24 (figure 5)

Diagram for Physics question 24 (figure 6)

Diagram for Physics question 24 (figure 7)

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An inertial observer sees two spaceships S and T flying away from each other along x-axis with individual speed

, where c is the speed of light. The speed of T with respect to S is

Your answerChoose one option.

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Let P, Q and R be three different nuclei. Which one of the following nuclear processes is possible?

Your answerChoose one option.

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The temperature dependence of the electrical conductivity (

) of three intrinsic semiconductors A, B and C is shown in figure.

Let

and

be the bandgaps of A, B and C, respectively. Which one of the following relations is correct?

Your answerChoose one option.

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Following trial wavefunctions

and

are used to get a variational estimate of the ground state energy of the helium atom.

and

are the variational parameters,

and

are the position vectors of the electrons. Let

be the exact ground state energy of the helium atom.

and

are the variational estimates of the ground state energy of the helium atom corresponding to

and

, respectively. Which one of the following options is true?

Your answerChoose one option.

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The wavefunction for a particle is given by the form

, where

and

are real constants. In which one of the following potentials

, the particle is moving?

Your answerChoose one option.

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Consider a volume integral

over a volume

, where

. Which of the following statement is/are correct?

Your answerSelect all correct options. You can choose more than one.

, if

is inside the volume

Integrand vanishes for

, if

is not inside the volume

Integrand diverges as

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GATE PH branch:ph PYQs

Question 21

Question 22

Question 23

Question 24

Question 25

Question 26

Question 27

Question 28

Question 29

Question 30