# 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.

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

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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