KVPY (Kishore Vaigyanik Protsahan Yojana) Stream-SA (Class 11) Physics: Questions 119 - 122 of 253

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Question number: 119

» Gravitation » Gravitational Acceleration

Appeared in Year: 2015

MCQ▾

Question

A ball is launched from the top of Mt. Everest which is at elevation of 9000 m. The ball moves in circular orbit around earth. Acceleration due to gravity near the earth’s surface is g. The magnitude of the ball’s acceleration while in orbit is

Choices

Choice (4) Response

a.

Nearly equal to g

b.

zero

c.

much greater than g

d.

close to

Question number: 120

» Properties of Solids & Liquids » Specific Heat Capacity

MCQ▾

Question

Five identical blocks of metal are at 250C, 52ºC, 600 C, 780 C and 90ºC respectively. The specific heat of the material of the five blocks increases with temperature. Which of the following is true about the final temperature Tf when all five blocks are brought into contact? (Assuming that no heat is lost to the surroundings)

Choices

Choice (4) Response

a.

Tf will be more than 56ºC

b.

Tf can be either more than or less than 56ºC depending on the precise variation of the specific heat with temperature

c.

Tf will be 56ºC

d.

Tf will be less than 56ºC

Question number: 121

» Kinetic Theory of Gases » Equation of State of a Perfect Gas

MCQ▾

Question

The number of air molecules in a (15m × 15m × 14m) room at standard temperature and pressure is of the order of,

Choices

Choice (4) Response

a.

9.73 × 1027

b.

8.36 × 1028

c.

9.73 × 1028

d.

6.34 × 1023

Question number: 122

» Atoms and Nuclei » Radioactivity

Appeared in Year: 2015

MCQ▾

Question

The beta particles of a radioactive metal originate from

Choices

Choice (4) Response

a.

The free electrons in the metal

b.

The orbiting electrons of the metal atoms

c.

The photons released from the nucleus

d.

The nucleus of the metal atoms

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