Physics Class 12 Chapter 1 Important Questions in Hindi

Physics Class 12 Chapter 1 Important Questions in Hindi. We covered all the Physics Class 12 Chapter 1 Important Questions in Hindi in this post for free so that you can practice well for the exam.

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Physics Class 12 Mock test for Students

A wheel with a moment of inertia of 100 kg·m² is acted upon by a constant torque of 500 N·m about its central axis. What increase in angular velocity will it have after 2 seconds?

a) 5 rad/s

b) 10 rad/s

c) 20 rad/s

d) 2.5 rad/s

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A thin, uniform rod of Mass 3 kg and length 2 m is initially at rest. It rotates about an axis through its centre and perpendicular to its length, reaching a speed of 900 rpm in 10 seconds. What is the torque acting on the rod?

a) 3.14 N·m

b) 6.28 N·m

c) 9.42 N·m

d) 12.56 N·m

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A wheel of radius 10 cm is free to rotate about its centre. A string wrapped around its rim is pulled with a force of 5 N, producing an angular acceleration of 2 rad/s². What is the moment of inertia of the wheel?

a) 2.5 kg·m²

b) 10 kg·m²

c) 0.25 kg·m²

d) 1 kg·m²

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A torque of 50 N·m acts on a rotating body for 5 seconds. How does its angular momentum change?

a) Increases by 250 kg·m²/s

b) Increases by 10 kg·m²/s

c) Increases by 55 kg·m²/s

d) Decreases by 250 kg·m²/s

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Which one of the following relations is incorrect?

a) Torque = moment of inertia × angular acceleration

b) force = Mass × acceleration

c) Angular momentum = moment of inertia × angular velocity

d) Moment of inertia = torque × angular acceleration

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When a constant torque acts on a body, the body:

a) Remains at rest or moves with uniform linear velocity

b) Acquires linear acceleration

c) Acquires angular acceleration

d) Rotates with constant angular speed

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A couple acting on a body produces:

a) Only translational motion

b) Only rotational motion

c) Both translational and rotational motion

d) No motion at all

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We covered all the Physics Class 12 chapter 1 important Questions in Hindi above in this post for free so that you can practice well for the exam.

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Also, check out:

• 12th Std Physics One Mark Questions
• 12th Physics Slow Learners Study Material
• 12th Physics 1 Mark Questions with Answers English Medium