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 constant torque of 500 Nm turns a wheel of the moment of inertia 100 kg m² about an axis through the center. Gain in angular velocity in 2 seconds is :

(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 starts from rest and rotates about an axis passing through its center and perpendicular to its length with a speed of 900 rpm in 10 seconds, then torque acting on it is :

(A) 3.14 Nm

(B) 6.28 Nm

(C) 9.42 Nm

(D) 12.56 Nm

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A wheel of radius 10 cm can rotate freely about its center. A string is wrapped over its rim and is pulled by a force of 5 N. It is found that the torque produces an angular acceleration of 2 rad/s² in the wheel. M.I. of the wheel is :

(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 Nm acts on a rotating body for 5 sec. Its angular momentum :

(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 is the wrong relation from the following?

(A) Torque = Moment of inertia x Angular acceleration

(B) Force = Mass X Acceleration

(C) Angular momentum = Moment of inertia x Angular velocity

(D) Moment of inertia = Torque x Angular acceleration

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When a steady torque is acting on a body, the body :

(A) Continues in its state of rest or uniform motion along a straight line

(B) Gets linear acceleration

(C) Gets angular acceleration

(D) Rotates at a constant speed

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A couple produces :

(A) Purely linear motion

(B) Purely rotational motion

(C) Linear and rotational motion

(D) No motion

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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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