KVPY (Kishore Vaigyanik Protsahan Yojana) Stream-SA (Class 11) Physics: Questions 120 - 123 of 253

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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

Question number: 123

» Rotational Motion » Concepts of Rotational Motion

MCQ▾

Question

A rope is wound around a hollow cylinder of mass 4.2 kg and radius 0.7 m. Calculate the angular acceleration of the cylinder, if the rope gets pulled with a force of 46 N. Also, find the linear acceleration of the rope.

Choices

Choice (4) Response

a.

9.546

b.

8.756

c.

10.948

d.

Question does not provide sufficient data or is vague

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