# KVPY (Kishore Vaigyanik Protsahan Yojana) Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics: Questions 31 - 34 of 268

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 268 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 200.00 or

## Question number: 31

Appeared in Year: 2010

MCQ▾

### Question

Three equal charges + q are placed at the three vertices of an equilateral triangle centered at the origin. They are held in equilibrium by a restoring force of magnitude F (r) = Kr directed towards the origin, where k is a constant. What is the distance of the three charges from the origin?

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 32

Appeared in Year: 2010

MCQ▾

### Question

Two identical particles of mass ‘m’ and charge q are shot at each other from a very great distance with an initial speed v. The distance of closest approach of these charges is –

### Choices

Choice (4) Response

a.

0

b.

c.

d.

## Question number: 33

» Thermodynamics » Laws of Thermodynamics » First Law of Thermodynamics

Appeared in Year: 2010

MCQ▾

### Question

A van der Waal’s gas obeys the equation of state. Its internal energy is given by . The equation of quasistatic adiabatic for this gas is given by-

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 34

Appeared in Year: 2010

MCQ▾

### Question

A book is resting on shelf that is undergoing vertical simple harmonic oscillations with amplitude of 2.5 cm. What is the minimum frequency of oscillation of the shell for which the book will lose contact with the shelf? (Assume that g = 10 m/s2)

### Choices

Choice (4) Response

a.

125.6 Hz

b.

20 Hz

c.

3.18 Hz

d.

10 Hz

f Page