GATE (Graduate Aptitude Test in Engineering) Physics: Questions 227 - 231 of 659

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Question 227

Appeared in Year: 2013

Question

MCQ▾

In the decay process, the transition , is –

Choices

Choice (4)Response

a.

Not allowed both by Fermi and Gamow – Teller selection rule

b.

Allowed by Fermi and but not by Gamow – Teller selection rule

c.

Allowed both by Fermi and Gamow – Teller selection rule

d.

Not allowed by Fermi but allowed by Gamow – Teller selection rule

Question 228

Appeared in Year: 2011

Question

MCQ▾

The solutions to the differential equation are a family of

Choices

Choice (4)Response

a.

Circles with different radii

b.

Straight lines with different slopes

c.

Circles with different centers

d.

Straight lines with different intercepts on the

Question 229

Appeared in Year: 2013

Write in Short

Short Answer▾

Consider the wave function , where is the normalization constant. For , the magnitude of probability current density up to two decimal places, in unit of , is ________.

Question 230

Appeared in Year: 2011

Question

MCQ▾

If a force is derivable from a potential function , where is the distance from the origin of the coordinate system, it follows that –

Choices

Choice (4)Response

a.

b.

c.

d.

Question 231

Appeared in Year: 2013

Question

MCQ▾

The entropy function of a system is given by , where and are positive constants. The temperature of the system is –

Choices

Choice (4)Response

a.

Negative for some energies

b.

Decreases monotonically with energy

c.

Zero

d.

Increases monotonically with energy

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