# KVPY (Kishore Vaigyanik Protsahan Yojana) Stream-SA (Class 11) Physics: Questions 15 - 18 of 253

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## Question number: 15

Appeared in Year: 2010

MCQ▾

### Question

A new temperature scale uses X as a unit of temperature, where the numerical value of the temperature t x in this scale is related to the absolute temperature T by t x = 3T + 300. If the heat of a material using this unit is 1400 J kg -1 X –1 its heat in the S. I. system of units is

### Choices

Choice (4) Response

a.

466.7 J kg –1 K –1

b.

4200 J kg -1 K –1

c.

1400 J kg –1 K –1

d.

impossible to determine from the information provided

## Question number: 16

Appeared in Year: 2011

MCQ▾

### Question

The following three objects (1) a metal tray, (2) a block of wood, and (3) a woolen cap are left in a closed room overnight. Next day the temperature of each is recorded as T 1, T 2 and T 3 respectively. The likely situation is.

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 17

Appeared in Year: 2010

MCQ▾

### Question

A planet of mass m is moving around a star of mass M and radius R in a circular orbit of radius r. The star abruptly shrinks to half its radius without any loss of mass. What change will be there in the orbit of the planet?

### Choices

Choice (4) Response

a.

The radius of the orbit will not change

b.

The radius of the orbit will increase

c.

The radius of the orbit will decrease

d.

The planet will escape from the star

## Question number: 18

MCQ▾

### Question

Consider two spherical planets of same average density moving around the Earth in circular orbits. Planet 2 is 8 times as massive as planet 1. And distance between Earth and planet 1 is twice than that of planet 2. The ratio of the acceleration due to gravity of the second planet to that of first is,

### Choices

Choice (4) Response

a.

8

b.

64

c.

16

d.

32

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