Engineering Sciences
GATE XE Properties and Applications of Materials PYQs
Build your understanding with focused practice from past exam papers.
Questions 21–30 of 79. Imported answers require independent review unless marked reviewed.
Question 45
Open questionXE-CMCQ1 markNeeds review
The magnetization (M) – magnetic field (H) curves for four different materials are given below. Which one of these materials is most suitable for use as a permanent magnet?
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The band gap of a semiconducting material is ∼ 2 eV. Which one of the following absorption (A) vs. energy (in eV) curves is correct?
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Open questionXE-CNAT1 markNeeds review
The tensile true stress (
) – true strain (
) curve follows the Hollomon equation:
At the maximum load, the work-hardening rate
is (in MPa): ____________ (round off to nearest integer)Log in to check the answer
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In a semiconductor, the ratio of electronic mobility to hole mobility is 10. The density of electrons and holes are
and
, respectively. If the conductivity of the material is
, then the mobility of holes is (in
): ____________ (rounded off to nearest integer)Given: Charge of an electron:
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Open questionXE-CMSQ2 marksNeeds review
Specific heat (
) of a material was found to depend on temperature as shown below. Which of the following statement(s) is/are true? 
Your answerSelect all correct options. You can choose more than one.
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The Young’s modulus of a quartz piezoelectric crystal is 100 GPa. The uniaxial stress required to change its polarization by 1% is (give absolute value in GPa) ________ (rounded off to nearest integer)
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A one-dimensional nanowire has a linear electron density of
. The Fermi energy of the system is (in eV) ______ (rounded off to two decimal places)Given:
where ‘m’ is the mass of an electronLog in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 46
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In an ideal rubber, the primary factor responsible for elasticity up to small strains is
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Which one of the following statements is true for an intrinsic semiconductor?
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Open questionXE-CMSQ1 markNeeds review
Vickers microhardness (HV) of a ductile material A is higher than another ductile material B. Which of the following is/are true?
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