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 |
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. |
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. |
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. |
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 |