GATE PH 2023 Paper 1 — page 8

Questions 22–24 of 65. Imported answers require review unless explicitly marked reviewed.

Paper practice 65 questionsPage 8 of 22

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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2023 · Paper 1