GATE (Graduate Aptitude Test in Engineering) Physics: Questions 384 - 388 of 659

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Passage

Consider the decay of a free neutron at rest in the laboratory.

Question 384 (1 of 2 Based on Passage)

Appeared in Year: 2008

Question

MCQ▾

Using the result of the above problem, answer the following. Which of the following represents approximately the maximum allowed energy of the anti – neutrino ?

Choices

Choice (4)Response

a.

b.

c.

d.

Question 385 (2 of 2 Based on Passage)

Appeared in Year: 2008

Question

MCQ▾

Which of the following configuration of the decay products correspond to the largest energy of the anti – neutrino ?

(Rest mass of electron , rest mass of proton and rest mass of neutron )

Choices

Choice (4)Response

a.

In the laboratory, proton is produced at rest.

b.

In the laboratory, momenta of proton, electron and the anti – neutrino all have the same magnitude.

c.

In the laboratory, proton and electron fly-off with (nearly) equal and opposite momenta

d.

In the laboratory, electron is produced at rest.

Passage

In the laboratory frame, a particle of rest mass is moving in the positive direction with a speed of . It approaches an identical particle , moving in the negative direction with a speed of .

Question 386 (1 of 2 Based on Passage)

Appeared in Year: 2007

Question

MCQ▾

The energy of the particle in the rest frame of the particle is –

Choices

Choice (4)Response

a.

b.

c.

d.

Question 387 (2 of 2 Based on Passage)

Appeared in Year: 2007

Question

MCQ▾

The speed of the particle in the rest frame of the particle is –

Choices

Choice (4)Response

a.

b.

c.

d.

Passage

Consider Fermi theory of decay.

Question 388 (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

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