Classical Mechanics-Special Theory of Relativity (CSIR Physical Sciences): Questions 11 - 14 of 15

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Question number: 11

» Classical Mechanics » Special Theory of Relativity » Relativistic Kinematics

Appeared in Year: 2012

MCQ▾

Question

What is the proper time interval between the occurrences of two events if in one inertial frame the events are separated by 7.5×105km and occurs 6.5s apart? (June)

Choices

Choice (4) Response
a.

6.50s

b.

6.00s

c.

5.00s

d.

5.75s

Question number: 12

» Classical Mechanics » Special Theory of Relativity » Mass-Energy Equivalence

Appeared in Year: 2011

MCQ▾

Question

The minimum energy of an electron (the rest mass of which is 0.5 MeV) that can emit Cerenkov radiation while passing through water (of refractive index 1.5) is approximately – (December)

Choices

Choice (4) Response
a.

1.0MeV

b.

0.5MeV

c.

3.0MeV

d.

0.6MeV

Question number: 13

» Classical Mechanics » Special Theory of Relativity » Relativistic Kinematics

Appeared in Year: 2011

MCQ▾

Question

Two gravitating bodies A and B with masses mA and mB , respectively, are moving I circular orbit. Assume that mBmA and let the radius of the orbit of body A be RA . If the body A is losing mass adiabatically, its orbital radius RA is proportional to –

(June)

Choices

Choice (4) Response
a.

1mA

b.

1mA2

c.

mA2

d.

mA

Question number: 14

» Classical Mechanics » Special Theory of Relativity » Mass-Energy Equivalence

Appeared in Year: 2011

MCQ▾

Question

An atom of mass M can be excited to a state of mass M+Δ by photon capture. The frequency of a photon which can cause this transition is – (December)

Choices

Choice (4) Response
a.

Δ(Δ+2M)c22Mh

b.

Δc22h

c.

Δc2h

d.

Δ2c22Mh

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