22d ago

125 Views

60 Downloads

1.66 MB

22 Pages

Transcription

PLEMSACOTENTN

MHT-CETNTWritten in accordance with the latest MHT-CET Paper Pattern which includes topics based on Std. XII Sc.and relevant chapters of Std. XI Sc. (Maharashtra State Board)PHYSICSSalient FeaturesTETRIUMPHN Includes chapters of Std. XII and relevant chapters of Std. XI as per latestMHT-CET Syllabus.O Exhaustive subtopic wise coverage of MCQs. Notes, Shortcuts, Mindbenders, Formulae provided in each chapter.C Various competitive exam questions updated till the latest year. Includes MCQs from NEET 2016, 2017 and 2018. Includes MCQs upto MHT-CET 2018.E Evaluation test provided at the end of each chapter. Two Model Question Papers with answers at the end of the book.PL Additional inclusion: ‘The physics of .’.SAMScan the adjacent QR code or visit www.targetpublications.org/tp12740to download Hints for relevant questions and Evaluation Test in PDFformat.Printed at: Repro India Ltd., Mumbai Target Publications Pvt. Ltd.No part of this book may be reproduced or transmitted in any form or by any means, C.D. ROM/Audio Video Cassettes or electronic, mechanicalincluding photocopying; recording or by any information storage and retrieval system without permission in writing from the Publisher.P.O. No. 134887TEID: 12740 JUP

PREFACETENT“Triumph Physics” is a complete and thorough guide to prepare students for MHT-CET examination. This bookis based on the MHT-CET syllabus which includes topics based on Std. XII Sc. and relevant chapters of Std. XISc. (Maharashtra State Board)Formulae that form a vital part of MCQ solving are provided in each chapter. Notes provide importantinformation about the topic. Shortcuts provide easy and less tedious solving methods. Mindbenders have beenintroduced to bridge the gap between a text book topic and the student’s understanding of the same. A quickreference to the notes, shortcuts and mindbenders has been provided wherever possible in the hints.MCQs in each chapter are divided into three sections:Classical Thinking: consists of straight forward questions including knowledge based questions.Critical Thinking: consists of questions that require a basic understanding of the concept.Competitive Thinking: consists of questions from various competitive examinations like MHT CET, JEE,PLECONAIPMT/NEET-UG, AIIMS, AFMC, CPMT, Gujarat (GUJ CET), KCET, Assam CEE, BCECE, Telangana State (TS)EAMCET(Engineering, Medical) etc.An Evaluation Test has been provided at the end of each chapter and two Model Question Papers (asper MHT CET pattern) to assess the level of preparation of the student on a competitive level.Hints have been provided in downloadable format to relevant MCQs and evaluation test which arebroken down to the simplest form possible.An additional feature called “The physics of .” has been included in the book to foster a keen interestin the subject of physics.Informative Table of “Various Physical Quantities and Conversion Factors” has been provided at theend for a quick glance.The journey to create a complete book is strewn with triumphs, failures and near misses. If you think we’venearly missed something or want to applaud us for our triumphs, we’d love to hear from you.Please write to us at: [email protected] of luck to all the aspirants!MYours faithfullyAuthorsSAEdition: FirstDisclaimerThis reference book is transformative work based on textual contents published by Bureau of Textbook. We the publishers are making this reference book which constitutes as fairuse of textual contents which are transformed by adding and elaborating, with a view to simplify the same to enable the students to understand, memorize and reproduce the samein examinations.This work is purely inspired upon the course work as prescribed by the Maharashtra State Board of Secondary and Higher Secondary Education, Pune. Every care has been takenin the publication of this reference book by the Authors while creating the contents. The Authors and the Publishers shall not be responsible for any loss or damages caused to anyperson on account of errors or omissions which might have crept in or disagreement of any third party on the point of view expressed in the reference book. reserved with the Publisher for all the contents created by our Authors.No copyright is claimed in the textual contents which are presented as part of fair dealing with a view to provide best supplementary study material for the benefit of students.

MHT-CET PAPER PATTERN NT There will be three papers of Multiple Choice Questions (MCQs) in ‘Mathematics’, ‘Physics andChemistry’ and ‘Biology’ of 100 marks each.Duration of each paper will be 90 minutes.Questions will be based on the syllabus prescribed by Maharashtra State Board of Secondary and HigherSecondary Education with approximately 20% weightage given to Std. XI and 80% weightage will be givento Std. XII curriculum.Difficulty level of questions will be at par with JEE (Main) for Mathematics, Physics, Chemistry and at parwith NEET for Biology.There will be no negative marking.Questions will be mainly application based.Details of the papers are as given below:TE Approximate No. of Multiple ChoiceQuestions (MCQs) based onSubjectStd. XI10Physics1040Chemistry1040Biology (Botany)Paper IIIBiology .ii.EQuestions will be set onthe entire syllabus of Physics, Chemistry, Mathematics and Biology subjects of Std. XII, andchapters / units from Std. XI curriculum as mentioned below:PL MathematicsOPaper IIStd. XIICPaper IMark(s) PerNPaperSubject1PhysicsMSr. No.ChemistrySA234MathematicsChapters / Units of Std. XIMeasurements, Scalars and Vectors, Force, Friction in solids and liquids,Refraction of Light, Ray optics, Magnetic effect of electric current,Magnetism.Some basic concepts of chemistry, States of matter: Gases and liquids,Redox reactions, Surface chemistry, Nature of chemical bond, Hydrogen,s-Block elements (Alkali and alkaline earth metals), Basic principles andtechniques in organic chemistry, Alkanes.Trigonometric functions, Trigonometric functions of Compound Angles,Factorization Formulae, Straight Line, Circle and Conics, Sets, Relationsand Functions, Probability, Sequences and series.BiologySection I – BotanySection II – ZoologyDiversity in organisms, Biochemistry of cell, Plant Water Relations andMineral Nutrition, Plant Growth and Development.Organization of Cell, Animal tissues, Human Nutrition, HumanRespiration.

CONTENTChapter NamePage No.NTSr. No.TextbookChapterNo.Std. XI11Measurements22Scalars and Vectors34Force45Friction in Solids and Liquids58Refraction of Light69Ray Optics712Magnetic Effect of Electric Current150813Magnetism169123NTE4272101128Std. XII1Circular Motion102Gravitation113Rotational ace Tension342157Wave Motion365168Stationary Waves391179Kinetic Theory of Gases and Radiation4181920CE18521810Wave Theory of Light46511Interference and Diffraction48512Electrostatics51513Current Electricity553M21PL18O914Magnetic Effect of Electric Current5752315Magnetism6032416Electromagnetic Induction6172517Electrons and Photons6582618Atoms, Molecules and Nuclei6792719Semiconductors7132820Communication Systems745Model Question Paper - I761Model Question Paper - II766Various Physical Quantities and Conversion Factors771SA22Note: Questions of standard XI are indicated by ‘*’ in each Model Question Paper.

TextbookChapter No.13NTMagnetismSubtopicsMagnetic refrigeration13.1 Origin of magnetism due to moving charge13.2 Definition of magnetic dipole moment and its unit13.3 Equivalence between magnetic dipole and currentNcarrying coil and solenoidTE13.0 Introduction13.4 Torque acting on a magnet in uniform magneticOinduction13.5 Earth’s magnetic fieldC13.6 Electromagnet and factors affecting their strength13.7 Magnetic induction due to a bar magnet at a point alongEthe axis and at a point along the equatorPLFormulaeMagnetic induction: B A2.Magnetic length:52l (Geometric length)6where l represents the half length of themagnet.SAM1.3.Magnetic moment:i.magnitude,M m 2lii.vector form, Torque acting on a bar magnet: M B MB sin 6.Magnetic moment of a current carryingsolenoid:M nIA7.Magnetic induction at a point along the axisof a solenoid: 2nIABaxis 04 r 38.Magnetic induction at a point along the axisof a magnetic dipole: 2MrBaxis 0 .24 r l 2 29.Magnetic induction at a point along theequator of a magnetic dipole: MBequator 0 .4 r 2 l 2 3/ 2 M m(2l )4.5.Magnetic refrigeration is a coolingtechnology based on the magnetocaloriceffect. The magnetocaloric effect (MCE,from magnet and calorie) is a magnetothermodynamic phenomenon in which atemperature change in a suitable materialis caused by exposing the material to achanging magnetic field.Pole strength of a bar magnet:Mm 2l169

MHT-CET Triumph Physics (MCQs)B2V BH2Earth’s magnetic field:i.BH B cos ii.BV B sin Biii. tan VBHNotes characterized by magnetic dipole moment M .The magnetic dipole moment of a magneticsubstance is mainly due to the spinning ofelectrons.2.Magnetic length is the distance between twoopposite poles of a bar magnet. If geometriclength is given then magnetic length can bedetermined by the formula.5Magnetic length Geometric length62.There can be magnets with no poles. Forexample, a magnetised ring (called toroid) orsolenoid of infinite length has properties of amagnet, but no poles.3.Atoms which have paired electrons have theirmagnetic moment zero.4.A magnet suspended freely at equator will setitself parallel to the surface of earth while onesuspended at pole will stand vertical.5.6.CEA short magnet placed in a non-uniformmagnetic field undergoes rotational andtranslational motion.4.Torque acting on a bar magnet PL3. i.M If 0 or 180 , sin 0 0If B 1 and 90 Mii. 1.Cutting a bar magnet into two equal piecesalong its length produces magnets of half polestrength and half dipole moment.2.Cutting a bar magnet into two equal piecesperpendicular to its length produces magnetsof same pole strength but half the dipolemoment.3.When a bar magnet of pole strength ‘m’ andmagnetic moment ‘M’ is cut into n equal partslongitudinally and transversely then polemand magneticstrength of each piece nMmoment of each piece 2n4.If a bar magnet of length ‘L’ and magneticmoment ‘M’ is bent to form a semicircular arcthen new magnetic moment of bar magnet isgiven by2MM πSA1 T 1 N/A m 1 Wb/m2 104 G6.Magnetic poles are approximately 2000kilometres away from the geographic poles.7.Magnetic declination is determined by acompass needle free to rotate in the horizontalplane, about the vertical axis. And themagnetic dip angle is measured by allowingthe compass needle to rotate freely in thevertical plane of magnetic meridian, about thehorizontal axis.170For shielding a certain region of space frommagnetic field, we surround the region by softiron rings. Magnetic field lines will be drawninto the rings and the space enclosed will befree of magnetic field.Shortcuts M B MB sin 5.Electric lines of force are discontinuous,whereas magnetic field lines are closedcontinuous curves.O1.In electricity, an isolated charge can exist; inmagnetism, an isolated magnetic pole does notexist. The simplest magnetic structure that canexist is only a magnetic dipole or current loopNT1.The magnitude of earth’s magnetic field ata given place: B 12.MindbendersTE11.Magnetic induction for a short bar magnet: 2Mi.Baxis 0 . 34 r Mii.Bequator 0 . 34 riii. Baxis 2Bequator.N10.

Chapter 13: Magnetism7.The magnetic length of a dipole is5(A) geometric length61 geometric length(B)2(C) 2 geometric length6(D) geometric length58.The pole strength of a magnet is(A) vector quantity with SI unit A m(B) scalar quantity with SI unit A/m(C) vector quantity with SI unit A/m(D) scalar quantity with SI unit A m9.The magnitude of magnetic induction at apoint in a magnetic field of area 25 cm2 andmagnetic flux 5 10 4 Wb is(A) 0.02 T(B) 0.2 Wb/m2(C) 200 gauss(D) 0.02 N/A m13.0 Introduction1.A magnet is referred to as magnetic dipole inwhich its pole(A) can be isolated.(B) cannot be isolated.(C) are fictitious.(D) both (B) and (C).CO2.The property of attracting small pieces of ironby a substance is referred as .(A) magnetism(B) demagnetisation(C) magnetisation(D) electromagnetismNClassical ThinkingNTInverse cube law: For a short bar magnet, themagnetic induction at a point, either on itsaxial line or its equatorial line is inverselyproportional to the cube of the distance of thatpoint from the centre of the magnet.B r31i.e., B 3 or 1 23 .rB2 r1TE5.Which of the following is NOT a unit ofmagnetic induction?(A) Wb/m2(B) tesla(C) N/A m(D) N m/A4.Magnetic lines of force are .(A) continuous(B) discontinuous(C) always straight line(D) zig-zag linesMPLE3.Magnetic lines of force in external space andinside the magnetic dipole respectively gofrom(A) S-pole to N-pole and N-pole to S-pole.(B) N-pole to S-pole and S-pole to N-pole.(C) S-pole to N-pole in both cases.(D) N-pole to S-pole in both cases.SA5.6.Magnetic flux is defined as number ofmagnetic lines of forces passing through agiven area, such that angle between the linesof forces and surface is(B) 45 (A) 0 (D) 120 (C) 90 13.1 Origin of magnetism due to movingcharge10.The total magnetic moment of an atom is due to(A) orbital motion of electrons.(B) spin motion of electrons.(C) both (A) and (B).(D) existence of protons in nucleus.11.The net magnetic moment of an atom becomeszero, if atomic magnetic moments are oriented in(A) random directions.(B) specific direction.(C) parallel to each other.(D) perpendicular to each other.12.In a conductor, moving electric chargesproduce .(A) magnetic field(B) electric field(C) gravitational field(D) thermionic effect13.The cause of magnetisation of matter lies with(A) motion of electrons.(B) charge on electrons.(C) distance between the nucleus andoutermost electron.(D) both (A) and (B).171

MHT-CET Triumph Physics (MCQs)M Mo Ms(D)22.Suppose we wish to have a current carryingcoil equivalent to a magnet with moment10 A m2. When the coil has 75 turns andcarries a current of 120 mA, the area of thecoil is(B) 1.1 m2(A) 0.1 cm22(C) 1.2 m(D) 11.2 m223.A torque of 25 N m acts on a current carryingcoil of area 5 m2 and magnetic moment2 A m2 in a magnetic field of induction2 Wb/m2. The angle between normal to coiland magnetic induction is 30 . Then value ofcurrent is(A) 0.4 A(B) 0.5 A(C) 400 mA(D) 5 AOWhich of the following is NOT true aboutmagnetic dipole moment?(A) It is the product of pole strength andmagnetic length.(B) SI unit of magnetic dipole moment isjoule/tesla.(C) It is a vector quantity directed from‘ m’ to ‘ m’.(D) It depends on the area of cross section ofmagnet.A bar magnet has geometric length4.8 10 2 m. The magnetic moment of barmagnet, of pole strength 20 A m is(A) 0.8 A m2(B) 0.6 A m22(C) 0.4 A m(D) 1 A m2The magnetic moment of a current carryingloop whose circumference with radius ‘r’ isequal to the perimeter of square with length l is2Il 2(B)(A) 2 r2l 4Il 24 l 2(D)(C) I24.The direction of magnetic moment of a currentcarrying circular coil is(A) along the circumference, in clockwisedirection.(B) along the axis, perpendicular to theplane.(C) alongthecircumference,inanticlockwise direction.(D) along the equator in straight line.SA13.3 Equivalence between magnetic dipoleand current carrying coil and solenoid19.172A current carrying coil represents .(A) an electric dipole(B) a magnetic dipole(C) a bar magnet(D) a horse shoe magnetThe magnetic induction at a point distant15 cm on the axis of a short bar magnet ofmoment 0.5 A m2 is(A) 3 10 5 Wb/m2 (B) 3 10 8 Wb/m2(C) 3 10 11 Wb/m2 (D) 4 10 5 Wb/m213.4 Torque acting on a magnet in uniformmagnetic induction25.The magnetic moment of a bar magnet is equalto the moment of couple when magnet is kept(A) parallel to uniform magnetic field ofunit induction.(B) perpendicular to uniform magnetic fieldof unit induction.(C) parallel to uniform magnetic field of anyinduction.(D) perpendicular to uniform magnetic fieldof any induction.26.The torque acting on a magnet of magneticmoment ‘M’ placed in a uniform magneticfield B isM18.PLE17.An arrangement of a long insulated wirewound in a closely packed helix represents(A) solenoid(B) electric dipole(C) magnetic needle (D) galvanometerC16.21.M M o Ms13.2 Definition of magnetic dipole momentand its unit15.When a current carrying coil is suspended in auniform magnetic induction B, the magnitudeof torque acting on it is given by(B) nIAB sin (A) MB cos (D) MB(C) nIAB cos NT(C)20.TEWhich of the following represents correctrelationship between total magnetic moment(M), orbital magnetic moment (Mo) and spinmagnetic moment (Ms)?M(B) M Mo Ms(A) M oMsN14. (A)perpendicular to M , parallel to B .(B)parallel to M , perpendicular to B .(C)perpendicular to both M and B .(D)parallel to both M and B .

Chapter 13: Magnetism 34.The angle between earth’s magnetic field at agiven place and the horizontal is known as.(A) angle of dip(B) magnetic inclination(C) magnetic declination(D) both (A) and (C)35.The angle of dip at any place on earth’ssurface lies between .(A) 0 to 90 (B) 90 to 360 (C) 0 to 180 (D) 90 to 270 36.At a given place let angle of dip be 30 thenthe vertical component of earth’s magneticinduction is3(B) B(A)B2B(C) 0(D)2 29.When a bar magnet is placed in a uniformmagnetic field, it experiences(A) only force.(B) only torque.(C) both force and torque.(D) no force, no torque.If the magnitude of torque is equal to themagnetic dipole moment and the axis ofmagnet is perpendicular to the field then themagnitude of magnetic induction is(A) 1 gauss(B) 1 Wb/m2(C) 104 gauss(D) both (B) and (C)13.5 Earth’s magnetic fieldCWhich of the following is true about axis ofearth’s magnetic dipole and axis of rotation ofthe earth?(A) They coincide with each other.(B) They are mutually perpendicular.(C) The magnetic axis is inclined at an angle11.5 to axis of rotation of the earth.(D) They are parallel to each other.MPL31.The study of earth’s magnetic field is called as(A) geographic magnetism.(B) terrestrial magnetism.(C) geomagnetism.(D) both (B) and (C).E30.The direction of earth’s magnetic field at anyplace is specified in terms of(A) magnetic induction at meridian.(B) magnetic field declination.(C) magnetic field inclination.(D) both (B) and (C).SA32.33.37.If at a given place, the horizontal and verticalcomponent of earth’s magnetic induction areequal then angle of dip is(A) 60 (B) 0 (D) 30 (C) 45 O28.Nmagnetic field when angle between M and Bare 90 and 0 respectively is1(A) 1(B) 0(C) (D)2NTThe ratio of torque acting on a magnet ofmagnetic moment ‘M’ placed in uniformTE27.The angle between the magnetic meridian andgeographic meridian at place is known as.(A) magnetic declination(B) magnetic inclination(C) angle of dip(D) both (B) and (C)38.The earth’s magnetic field(A) varies in direction but not in magnitude.(B) varies in magnitude but not in direction.(C) varies both in magnitude and direction.(D) remains constant.39.A vertical plane passing through the magneticnorth and south pole of the earth is .(A) geographic axis(B) geographic meridian(C) magnetic meridian(D) magnetic equator40.The strength of earth’s magnetic field on theearth is of the order of(B) 10 4 tesla(A) 10 4 Wb 4(D) 102 gauss(C) 10 A m41.Which of the following statements is true?(A) The magnetic meridian coincides withgeographic meridian.(B) The angle between magnetic meridianand geographic meridian is angle of dip.(C) The magnetic declination is same at allplaces on earth.(D) Magnetic equator is a great circle on thesurface of the earth, in a planeperpendicular to the magnetic axis.173

MHT-CET Triumph Physics (MCQs)Soft iron is used for making electromagnetbecause it(A) has low retentivity.(B) has low coercivity.(C) small hysteresis loss.(D

MHT-CET Syllabus. • Exhaustive subtopic wise coverage of MCQs. • Notes, Shortcuts, Mindbenders, Formulae provided in each chapter. • Various competitive exam questions updated till the latest year. • Includes MCQs from NEET 2016, 2017 and 2018. • Includes MCQs upto MHT-CET 2018. • Evaluation test provided at the end of each chapter.