GATE PH branch:ph PYQs & Answers — Page 22

Questions 211–220 of 650. Imported answers require independent review unless marked reviewed.

The Hall experiment is carried out with a non-magnetic semiconductor. The current

is along the

-axis and the magnetic field

is along the

-axis. Which one of the following is the CORRECT representation of the variation of the magnitude of the Hall resistivity

as a function of the magnetic field?

Your answerChoose one option.

Diagram for Physics question 16 (figure 2)

Diagram for Physics question 16 (figure 3)

Diagram for Physics question 16 (figure 4)

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Consider a two dimensional Cartesian coordinate system in which a rank 2 contravariant tensor is represented by the matrix

. The coordinate system is rotated anticlockwise by an acute angle

with the origin fixed. Which one of the following matrices represents the tensor in the new coordinate system?

Your answerChoose one option.

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A compound consists of three ions X, Y and Z. The Z ions are arranged in an FCC arrangement. The X ions occupy

of the tetrahedral voids and the Y ions occupy

of the octahedral voids. Which one of the following is the CORRECT chemical formula of the compound?

Your answerChoose one option.

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For a non-magnetic metal, which one of the following graphs best represents the behavior of

vs.

, where

is the heat capacity and

is the temperature?

Your answerChoose one option.

Diagram for Physics question 19 (figure 2)

Diagram for Physics question 19 (figure 3)

Diagram for Physics question 19 (figure 4)

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For nonrelativistic electrons in a solid, different energy dispersion relations (with effective masses

, and

) are schematically shown in the plots. Which one of the following options is CORRECT?

Your answerChoose one option.

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The figure schematically shows the

(magnetization) -

(magnetic field) plots for certain types of materials. Here

and

are plotted in the same scale and units. Which one of the following is the most appropriate combination?

Your answerChoose one option.

(Q) - Paramagnet; (R) - Type-I Superconductor; (S) - Antiferromagnet

(P) - Paramagnet; (Q) - Diamagnet; (R) - Type-I Superconductor

(P) - Paramagnet; (Q) - Antiferromagnet; (R) - Type-I Superconductor

(P) - Diamagnet; (R) - Paramagnet; (S) - Type-I Superconductor

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Graphene is a two dimensional material, in which carbon atoms are arranged in a honeycomb lattice with lattice constant

. As shown in the figure,

and

are two lattice vectors. Which one of the following is the area of the first Brillouin zone for this lattice?

Your answerChoose one option.

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nucleus emits a

-particle and is converted to

with

, which in turn decays to the

ground state with

by emitting two photons in succession, as shown in the figure. Which one of the following statements is CORRECT?

Your answerChoose one option.

is an electric octupole transition

is a magnetic quadrupole transition

is an electric quadrupole transition

is a magnetic quadrupole transition

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Which one of the following options is CORRECT for the given logic circuit?

Your answerChoose one option.

P = 1, Q = 1; X = 0

P = 1, Q = 0; X = 1

P = 0, Q = 1; X = 0

P = 0, Q = 0; X = 1

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An atom with non-zero magnetic moment has an angular momentum of magnitude

. When a beam of such atoms is passed through a Stern-Gerlach apparatus, how many beams does it split into?

Your answerChoose one option.

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GATE PH branch:ph PYQs

Question 16

Question 17

Question 18

Question 19

Question 20

Question 21

Question 22

Question 23

Question 24

Question 25