CBSE Class 11 Physics Chapter 7 System of Particles and Rotational Motion Multiple Choice Questions with Answers. MCQ Questions Class 11 Physics System of Particles and Rotational Motion with Answers was Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 11 Physics System of Particles and Rotational Motion MCQs with Answers to know their preparation level.
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MCQ Questions Class 11 Physics System of Particles and Rotational Motion with Answers - Set - 5
Question 1:
A rope is wound around a hollow cylinder of mass 3 kg and radius 40 cm. What is the angular acceleration of the cylinder if the rope is pulled with a force of 30 N?
(a) 0.25 rad s–2
(b) 25 rad s–2
(c) 5 m s–2
(d) 25 m s–2
Correct Answer – (A)
Question 2 :
A solid cylinder of mass 2 kg and radius 4 cm is rotating about its axis at the rate of 3 rpm. The torque required to stop it after 2p revolutions is
(a) 2 × 106 N m
(b) 2 × 10–6 N m
(c) 2 × 10–3 N m
(d) 12 × 10–4 N m
Correct Answer – (B)
Question 3 :
Moment of inertia of a uniform circular disc about a diameter is I. Its moment of inertia about an axis perpendicular to its plane and passing through a point on its rim will be
(a) 5I
(b) 3I
(c) 6I
(d) 4I
Correct Answer – (C)
Question 4 :
A thin rod of length L and mass M is bent at its midpoint into two halves so that the angle between them is 90°. The moment of inertia of the bent rod about an axis passing through the bending point and perpendicular to the plane defined by the two halves of the rod is
(a) ML2 /6
(b) √2/ML2 /24
(c) ML2 /24
(d) ML2 /12
Correct Answer – (D)
Question 5 :
From a disc of radius R and mass M, a circular hole of diameter R, whose rim passes through the centre is cut. What is the moment of inertia of the remaining part of the disc about a perpendicular axis, passing through the centre?
(a) 11 MR2/32
(b) 9 MR2/32
(c) 15 MR2/32
(d) 13 MR2/32
Correct Answer – (D)
MCQ Questions Class 11 Physics System of Particles and Rotational Motion with Answers
Question 6 :
Three objects, A : (a solid sphere), B : (a thin circular disk) and C : (a circular ring), each have the same mass M and radius R. They all spin with the same angular speed w about their own symmetry axes.
The amounts of work (W) required to bring them to rest, would satisfy the relation
(a) WC > WB > WA
(b) WA > WB > WC
(c) WB > WA > WC
(d) WA > WC > WB
Correct Answer – (A)
Question 7 :
A wheel has angular acceleration of 3.0 rad/sec2 and an initial angular speed of 2.00 rad/sec. In a time of 2 sec it has rotated through an angle (in radians) of
(a) 10
(b) 12
(c) 4
(d) 6
Correct Answer – (A)
Question 8 :
The ratio of the radii of gyration of a circular disc about a tangential axis in the plane of the disc and of a circular ring of the same radius and mass about a tangential axis in the plane of the ring is
(a) 2 : 3
(b) 2 : 1
(c) √5 : √6
(d) 1: √2
Correct Answer – (C)
Question 9 :
The moment of inertia of a thin uniform rod of mass M and length L about an axis passing through its midpoint and perpendicular to its length is I0. Its moment of inertia about an axis passing through one of its ends and perpendicular to its length is
(a) I0 + ML2/2
(b) I0 + ML2/4
(c) I0 + 2ML2
(d) I0 + ML2
Correct Answer – (B)
Question 10 :
A fly wheel rotating about fixed axis has a kinetic energy of 360 joule when its angular speed is 30 radian/sec. The moment of inertia of the wheel about the axis of rotation is
(a) 0.6 kg m2
(b) 0.15 kg m2
(c) 0.8 kg m2
(d) 0.75 kg m2
Correct Answer – (C)
- NCERT Solutions Class 11 Physics Chapter 1 : Physical world
- NCERT Solutions Class 11 Physics Chapter 2 : Units And Measurements
- NCERT Solutions Class 11 Physics Chapter 3 : Motion In A Straight Line
- NCERT Solutions Class 11 Physics Chapter 4 : Motion In A Plane
- NCERT Solutions Class 11 Physics Chapter 5 : Laws of Motion
- NCERT Solutions Class 11 Physics Chapter 6 : Work Energy Power
- NCERT Solutions Class 11 Physics Chapter 7 : Rotational-Motion
- NCERT Solutions Class 11 Physics Chapter 8 : Gravitation
- NCERT Solutions Class 11 Physics Chapter 9 : Mechanical Properties of Solids
- NCERT Solutions Class 11 Physics Chapter 10 : Mechanical Properties of Fluids
- NCERT Solutions Class 11 Physics Chapter 11 : Thermal Properties of Matter
- NCERT Solutions Class 11 Physics Chapter 12 : Thermodynamics
- NCERT Solutions Class 11 Physics Chapter 13 : Kinetic Theory
- NCERT Solutions Class 11 Physics Chapter 14 : Oscillations
- NCERT Solutions Class 11 Physics Chapter 15 : Waves
