Nuclear and Particle Physics-Conservation Laws (GATE Physics): Questions 1 - 3 of 3

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Question number: 1

» Nuclear and Particle Physics » Conservation Laws

Appeared in Year: 2015

MCQ▾

Question

The decay μ+e++γ is forbidden, because it violates –

Choices

Choice (4) Response

a.

Baryon and lepton number conservation

b.

Angular momentum conservation

c.

Momentum and lepton number conservations

d.

Lepton number conservation

Question number: 2

» Nuclear and Particle Physics » Conservation Laws

Appeared in Year: 2007

MCQ▾

Question

The strangeness quantum number is conserved in –

Choices

Choice (4) Response

a.

weak and electromagnetic interaction only

b.

strong, weak and electromagnetic interactions

c.

strong and electromagnetic interaction only

d.

strong and weak interactions only

Question number: 3

» Nuclear and Particle Physics » Conservation Laws

Appeared in Year: 2008

MCQ▾

Question

A neutral pi meson (π0) has a rest – mass of approximately 140MeVc2 and a lifetime of τsec . A π0 produced in the laboratory is found to decay after 1.25τsec into two photons. Which of the following sets represents a possible set of energies of the two photons as seen in the laboratory?

Choices

Choice (4) Response

a.

75MeVand100MeV

b.

25MeVand150MeV

c.

35MeVand100MeV

d.

70MeVand70MeV

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