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Written as per the latest HSC syllabus preseribed by the Maharashtra State Board, of Secondary and Higher Secondary Education, Pune., STD. XII Sci., A collection of, Board, Questions, 1994, to, 2020, Physics • Chemistry Mathematics Biology, Chapterwise compilation of relevant board questions, from 1994 to 2020, Salient Features, Subjects covered: Physics, Chemistry, Mathematics and Biology, · Covers questions from previous curriculum which fall under the latest syllabus from, 1994 to 2020., Chapterwise and Subtopic wise segregation of theory questions, Questions that belong to reduced syllabus 2020-21 have been marked., Board questions include: MCQS, Theory questions and Numericals., Printed at: Print to Print, Mumbai, Target Publications Pvt. Ltd, No part of this book may be reprodhuced or transmitted in any form or hy any means, C.D. ROM/Audio Video Cassettes, chuding photocopying, recording or by any information storage and retrieval system without permission in writing from the Publisher., electronic, mechanical, P.O. No. 1700, Balbharati Registration No.: 2018MH0022, TEID: 1752, vivo Y20

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vivo Y2, 01, Rotational Dynamics, Angular speed of a minute hand of a wrist watcl, |Oct 10, 7., in rad/s is, Multiple Choice Questions, A car is moving along a horizontal curve of, radius 20 m and coefficient of friction between, the road and wheels of the car is 0.25. If the, acceleration due to gravity is 9.8 m/s, then its, maximum speed is, 3 m's, (C) 7 mis, (B), (A), 60, 900, (C), (D), 1800, 3600, (Mar 08], 5 m's, 9 m's, If a cycle wheel of radius 0.4 m completes on, (B), (D), 8., revolution in 2 seconds, then acceleration of the, cycle is, (A), |Mar 1), A body performing uniform circular motion has, JOct 08], (A) 0.4 a m's, (B) 0.4 n' mis, 2., m/s, 0.4, 0.4, m's, (C), (D), (A), constant velocity, (B), constant acceleration, The radius of gyration of a ring of radius, about a tangent perpendicular to its plane, |Mar 11, 9., (C), constant kinetic energy, (D), constant displacement, A body is acted upon by a constant torque. In 4, seconds its angular momentum changes from L, to 41. The magnitude of the torque is, 3., (A) VER, (B) 2 R, R, (C), R, (D), JOct 08|, (A), 4., 3L, 10., The time period of conical pendulum, (B), 4, JOct 11, (C) 3L, (D), 121, Icose, Isine, 2n, (A), (B), Radius of gyration of a ring about a transverse, axis pussing through its centre is, 4., lcos, Isin0, |Mar 09], (C), 2n, (D), (A) 0.5 x diameter of ring, (B) diameter of ring, (C) 2x diameter of ring, (D) (diameter of ring, 11., Out of the following equations which i, WRONG?, [Mar 12, (A), (B), a, =ox V, 5., A stone is tied to a string and rotated in a, horizontal circle with constant angular velocity., If the string is released, the stone flies, (C), a, =axr, (D), 12., The moment of inertia of a body does no, depend on, (A) the mass of body., (B) the angular velocity of a body., (C), (Mar 10; Oct 091, (Feb 13 old course, (A) radially inward, (B) radially outward, (C) tangentially forward, (D) tangentially backward, the axis of rotation of a body., the distribution of the mass in the body., (D), 6., The radius of gyration of a solid sphere of mass, M and radius R rotating about an axis with its, diameter N is, 13., The moment of inertia of a thin uniform rod o, mass M and length L, about an axis passing, through a point, midway between the centre an, one end, perpendicular to its length is (Mar 13, (A) ML?, IMar 101, (A), Vs, (B), (B) -ML, (C), Vs, (D), ML, 48, (C), (D), ML, 16

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vivo Y20, Chapter 01: Rotational Dynamics, 14., Ir L'is the angular momentum and T is the, The body is retating with uniform angular, 21., velocity () having rotational kinetic energy, (E). Its angular momentum (L) is:, moment of inertia of a rotating body, then, July 16), JOet 131, represents its, (A) rotational P.E, (B) total energy, (C) rotational KE, (D) translational KE, (A), (B), (C), (D), When the angular acceleration of a rotating, body is zero, which physical quantity will be, equal to zero?, (A) Angular momentum, (B) Moment of inertia, (C), 22, A thin wire of length L and uniform linear mass, 15., density p is bent into a circular coil. Moment of, inertia of the coil about tangential axis in its, plane is, IMar 171, JOct 14], Torque, (D) Radius of gyration, (A), (B), Jol, A body of mass 'm' performs uniform circular, motion along a circular path of radius r with, velocity 'v. 1 its angular momentum is L, then, the centripetal force acting on it is, Apl, 23., (C), (D), 16., The period of a conical pendulum in terms of its, length ()., acceleration due to gravity (g) is:, July 17, semivertical angle (0) and, (Mar 15, ml, (A), (B), mr, 1 lcose, /sino, (A), (B), 2nV g, 2xV g, (C), (D), cose, V 4g, tan, (D), 024. If a rigid body of radius 'R' starts from rest and, rolls down an inclined plane of inclination 0", then lincar acceleration of body rolling down, July 171, (C), The kinetic energy of a rotating body depends, upon, (A) distribution of mass only., (B) angular speed only., (C) distribution of mass and angular speed., (D) angular acceleration only., 17., Mar 15), the plane is, K), (B) gsine 1+, R, (A), esino, (C), gsint, (D), K, 14, A particle rotates in U.C.M. with tangential, velocity 'v' along a horizontal circle of diameter, "D'. Total angular displacement of the particle, in time ' is, 18., 25., A particle of mass m performs vertical motion, in a circle of radius r. Its potential energy at the, highest point is, (g is acceleration due to gravity), (A) 2 mgr, (C) 0, |Mar 16|, (A), vt, (В), -t, |Mar 18], (B) mgr, (D) 3 mgr, (C), 2D, (D), D, 26., smass 0.25 kg and radius 0.5 m., A body of moment of inertia 5 kgm rotating, with an angular velocity 6 rad/s has the same, kinetic energy as a mass of 20 kg moving with a, velocity of, A thin ring, Its moment of inertia about an axis passing, through its centre and perpendicular to its plane, is, 19., |Mar 16|, ĮMar 18, Similar in Mar 12], (A) 0.0625 kg m, (B) 0,625 kg m, (C) 6.25 kg m, (D) 62.5 kg m, (A) 5 m/s, (B), 4 m/s, (C), 3 m/s, (D) 2 m/s, The difference in tensions in the string at lowest, and highest points in the path of the particle of, mass 'm' performing vertical circular motion is, 20, The dimensions of angular momentum are, July 18, Similar in Mar 081, 27., |July 161, (A) (LM'T'), (C) L' MT'], (B) [LM'T'), (D) [L' M'T], (A) 2 mg, (B), 4 mg, (C) 6 mg, (D) 8 mg