# KVPY (Kishore Vaigyanik Protsahan Yojana) Stream-SA (Class 11) Physics: Questions 72 - 74 of 253

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 253 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: 72

Appeared in Year: 2013

MCQ▾

### Question

The refractive index of a prism measured using three lines of a mercury vapour lamp. If μ1, μ2 and μ3 are the measured refractive indices for these green, blue and yellow lines respectively, then

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 73

Appeared in Year: 2012

MCQ▾

### Question

A block of mass m is sliding down an inclined plane with constant speed. At a certain instant t0, its height above the ground is h. The coefficient of kinetic friction between the block and the plane is μ. If the block reaches the ground at a later instant tg, then the energy dissipated by friction in the time interval (tg - t0) is:

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 74

Appeared in Year: 2013

MCQ▾

### Question

Solar energy is incident normally on the earth’s surface at the rate of about 1.4 kW m-2. The distance between the earth and the sun is 1.5 × 1011 m. Energy (E) and mass (m) are related by Einstein equation E = mc2 where c (3 × 108ms-1) is the speed of light in free space. The decrease in the mass of the sun is

### Choices

Choice (4) Response

a.

b.

c.

d.

f Page