GATE MT 2021 Paper 1 — page 10

Questions 28–30 of 65. Imported answers require review unless explicitly marked reviewed.

A body is subjected to a state of stress given by the following stress tensor:

MPa.

If yielding is predicted by the Tresca Criterion, the uniaxial tensile yield stress (in MPa) of the body should be less than or equal to: __________ (round off to nearest integer).

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Consider homogeneous nucleation of a spherical solid in liquid. For a given undercooling, if surface energy of a nucleus increases by 20 %, the corresponding increase (in percent) in the critical radius of the nucleus is: __________ (round off to nearest integer).

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If saturation magnetization of iron at room temperature is 1700 kA m

, the magnetic moment (in A m

) per iron atom in the crystal is: ______ × 10

(round off to 1 decimal place).

(Given: Lattice parameter of iron at room temperature = 0.287 nm)

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2021 · Paper 1

Question 18

Question 19

Question 20