AIIMS MBBS Entrance Test 2019 Physics Paper with Answer & Solutions 25 May First Shift Part 5

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Q-20: A disc of radius and mass half is rolling on an inclined plane. Find out friction force so that disc performs pure rolling.

Image friction force disc performs pure rolling.

Image Friction Force Disc Performs Pure Rolling

Options:

(1)

(2)

(3)

(4)

Answer: (2)

Solutions:

Image friction force disc performs pure rolling.

Image Friction Force Disc Performs Pure Rolling

.

Or

So

Q-21: If temperature of, radius of Sun is, radius of & distance between earth and. Find intensity of light on Earth.

Options:

(1)

(2)

(3)

(4)

Answer: (1)

Solutions:

Image radius of Sun and earth

Image Radius of Sun and Earth

Total energy emitted by

Energy received by earth

Q-22: If radius of. Find the time of relaxation.

Options:

(1)

(2)

(3)

(4)

Answer: (2)

Solutions:

Now

So

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