Condensed Matter Physics (CSIR Physical Sciences): Questions 10 - 14 of 16

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Question number: 10

» Condensed Matter Physics » Elastic Properties

Appeared in Year: 2012

MCQ▾

Question

A resistance strain gauge is fastened to a steel fixture and subjected to a stress of 1000kgm2 . If the gauge factor is 3 and the modulus of elasticity of steel is 2×1010kgm2 , then the fractional change in resistance of the strain gauge due to the applied stress is –

(Note: The gauge factor is defined as the ratio of the fractional change in resistance to the fractional change in length. ) (June)

Choices

Choice (4) Response

a.

0.16×1010

b.

1.5×107

c.

0.5×107

d.

3.0×10

Passage

A narrow beam of X – rays with wavelength 1.5 is reflected from an ionic crystal with an fcc lattice structure with a density of 3.32gcm3 . The molecular weight is 108AMU (1AMU=1.66×1024g) . (June)

Question number: 11 (1 of 2 Based on Passage) Show Passage

» Condensed Matter Physics » Diffraction and the Structure Factor

Appeared in Year: 2011

MCQ▾

Question

The lattice constant is –

Choices

Choice (4) Response

a.

6.00

b.

2.56

c.

4.56

d.

4.00

Question number: 12 (2 of 2 Based on Passage) Show Passage

» Condensed Matter Physics » Diffraction and the Structure Factor

Appeared in Year: 2011

MCQ▾

Question

The sine of the angle corresponding to (111) reflection is:

Choices

Choice (4) Response

a.

38

b.

14

c.

18

d.

34

Passage

A flux quantum (fluxoid) is approximately equal to 2×107gausscm2 . A type II superconductor is placed in a small magnetic field, which is then slowly increased till the field starts penetrating the superconductor. The strength of the field at this point is 2π×105 gauss. (June)

Question number: 13 (1 of 2 Based on Passage) Show Passage

» Condensed Matter Physics » Superconductivity » Type -II Superconductors

Appeared in Year: 2016

MCQ▾

Question

The penetrate depth of this superconductor is –

Choices

Choice (4) Response

a.

100

b.

10

c.

1000

d.

314

Question number: 14 (2 of 2 Based on Passage) Show Passage

» Condensed Matter Physics » Superconductivity » Type -II Superconductors

Appeared in Year: 2016

MCQ▾

Question

The applied field is further increased till superconductivity is completely destroyed. The strength of the field is now 8π×105gauss . The correlation length of the superconductor is:

Choices

Choice (4) Response

a.

2000

b.

200

c.

50

d.

628

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