11th Physics Study Material Tamil Medium

11th Physics Study Material Tamil Medium. We covered all the 11th Physics Study Material Tamil Medium in this post for free so that you can practice well for the exam.

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11th Physics Mock test for Students

If the Earth's radius were reduced to half its current value, the length of a day would be:

a) 48 hr

b) 24 hr

c) 12 hr

d) 6 hr

Show Answer

A body's angular momentum changes by 80 kg·m²/s when its angular velocity increases from 20 rad/s to 40 rad/s. The corresponding change in rotational kinetic energy is:

a) 400 J

b) 800 J

c) 1200 J

d) 2400 J

Show Answer

A horizontal disc rotates freely about a vertical axis at 90 rpm. A small Mass m sticks to the disc at a distance r from the axis, reducing the rotation to 60 rpm. The moment of inertia of the disc is:

a) mr²

b) 3/2 mr²

c) 2 mr²

d) 3 mr²

Show Answer

A ring of Mass 10 kg and diameter 0.4 m rotates about its axis at 2100 rpm. Its angular momentum is:

a) 88 kg·m²/s

b) 44 kg·m²/s

c) 4.4 kg·m²/s

d) 0.4 kg·m²/s

Show Answer

A constant torque applied to a rotating body increases its angular momentum from L₀ to 5 L₀ in 20 s. The magnitude of the torque is:

a) 1/5 L₀

b) 1/10 L₀

c) 5 L₀

d) 4 L₀

Show Answer

A Mass attached to a massless spring rotates in a circle with constant angular velocity and angular momentum L. If the spring’s length is halved while keeping angular velocity the same, the new angular momentum is:

a) L/4

b) L

c) 2L

d) L/2

Show Answer

A uniform disc of Mass 2 kg and radius 0.15 m rotates at 4 rad/s. The linear momentum of a particle on the rim about the axis is:

a) 2.4 kg·m/s

b) 4 kg·m/s

c) 1.2 kg·m/s

d) 0

Show Answer

A body of Mass 2 kg and radius of gyration 0.5 m rotates at 2 rad/s. Its angular momentum is:

a) 1 kg·m²/s

b) 2 kg·m²/s

c) 3 kg·m²/s

d) 4 kg·m²/s

Show Answer

A circular disc is rotating about its axis. An external torque of 0.02 Nm is applied in the opposite direction, bringing it to rest in 5 s. The disc’s initial angular momentum is:

a) 0.4 kg·m²/s

b) 0.025 kg·m²/s

c) 0.10 kg·m²/s

d) 0.01 kg·m²/s

Show Answer

Keeping the moment of inertia constant, if the time period of rotation is doubled, the angular momentum of the body:

a) Remains constant

b) Doubles

c) Becomes half

d) Quadruples

Show Answer

A 0.4 kg bead slides without friction along a horizontal circular wire of diameter 0.6 m. A tangential force produces an angular acceleration of 4 rad/s². The rate of change of its angular momentum is:

a) 0.144 kg·m²/s

b) 0.48 kg·m²/s

c) 0.144 Nm

d) 0.48 Nm

Show Answer

We covered all the 11th Physics study material tamil medium above in this post for free so that you can practice well for the exam.

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Also, check out:

• Class 11 History Chapter 4 Questions and Answers
• MCQ on States of Matter Class 11
• Questions on States of Matter Class 11