Solid State Physics [GATE (Graduate Aptitude Test in Engineering) Physics (PE)]: Questions 53 - 57 of 140

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Passage

Consider Fermi theory of decay.

Question 53 (1 of 2 Based on Passage)

Appeared in Year: 2006

Question MCQ▾

The number of final state of electrons corresponding to momenta between and is –

Choices

Choice (4)Response

a.

proportional to

b.

proportional to

c.

proportional to

d.

independent of

Edit

Question 54 (2 of 2 Based on Passage)

Appeared in Year: 2006

Question MCQ▾

The number of emitted electron with momentum and energy , in the allowed approximation, is proportional to ( is the total energy given up by the nucleus) –

Choices

Choice (4)Response

a.

b.

c.

d.

Edit

Passage

The powder diffraction pattern of a body centered cubic crystal is recorded by using X – rays of wavelength .

Question 55 (1 of 2 Based on Passage)

Appeared in Year: 2006

Question MCQ▾

If the planes diffract at , then lattice parameter is –

Choices

Choice (4)Response

a.

b.

c.

d.

Edit

Question 56 (2 of 2 Based on Passage)

Appeared in Year: 2006

Question MCQ▾

Assuming the atomic mass of the constituent atoms to be , then density of the crystal in units of is –

Choices

Choice (4)Response

a.

b.

c.

d.

Edit

Question 57

Appeared in Year: 2007

Question MCQ▾

When liquid oxygen is poured down close to a strong bar magnet, the oxygen stream is –

Choices

Choice (4)Response

a.

Attracted towards the higher field because it is diamagnetic

b.

Repelled towards the lower field because it is paramagnetic

c.

Attracted towards the higher field because it is paramagnetic

d.

Repelled towards the lower field because it is diamagnetic

Edit