JEE Advanced 2021 Full Test 2 Paper 2

PART – I

Physics

SECTION – A (One or More than one correct type)
This section contains 06 multiple choice questions. Each question has FOUR options (A), (B), (C) and (D). ONE OR MORE THAN ONE of these four options is(are) correct.

Question : 2 of 54

Marks: +1, -0

A metal sphere of radius R and specific heat C is rotated about an axis passing through its centre at a speed n rotation/second. It is suddenly stopped and 50% of its energy is used in increasing its temperature, then choose the correct statement(s) from the following?

Kinetic energy used to raise the temperature of the sphere is
2π2n2
5
MR2
Kinetic energy used to raise the temperature of the sphere is
5π2n
3
MR
The rise in the temperature of the sphere is
4π2n2R2
7C
The rise in the temperature of the sphere is
2π2n2R2
5C

Validate

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