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Physics part 2 chapter 14 (1st Half), Exercises of Physics

Physics

Physics part 2 chapter 14 (1st Half) Test Session Academy

Typology: Exercises

2019/2020

Uploaded on 03/16/2020

Umair-umer
Umair-umer 🇵🇰

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GreenHallAcademy
TestSession~2020 TotalMarks:25
Name:
Class:2ndyear
Date:21-January-2019
Test:Physics
Chapter:14(Electromagnetism(1
st
Half))
TimeAllowed:50minutes
MultipleChoiceQuestions(MCQ's).
Q1.Encircleortickthecorrectanswer. (1×5=5)
(i).Themagneticforceissimplya:
(a)reflectingforce (b)deflectingforce (c)restoringforce (d)gravitationalforce
(ii).Theunitofmagneticfluxis: (a)weber (b)henry (c)coulomb (d)tesla
(iii).Acurrentcarryingconductorissurroundedby:
(a)gravitationalfield (b)conservativefield (c)magneticfield (d)electricfield
(iv).Themagneticfieldinsideacurrentcarryinglongsolenoidis:
(a)nonuniform (b)weak (c)uniform&steady (d)zero
(v).Ifacurrentflowsfromtoptobottom throughawirethenthedirectionoflinesofforcewouldbe:
(a)paralleltowire (b)perpendiculartowire (c)clockwise (d)anticlockwise
Q2.WriteShortanswerstoanyfive(5)questions. (2×5=10)
(i).Givedimensionsofpermeabilityoffreespace.
(ii).Explainrighthandruletofindthedirectionoflinesofmagneticfield.
(iii).Ifachargedparticlemovesinastraightlineinacertainregionofspace,canyousaythatthe
magneticfieldintheregioniszero?
(iv).WhatisLorentzforce?Writeitsmathematicalexpression.
(v).DescribethechangeinthemagneticfieldinsideasolenoidcarryingasteadycurrentI,ifthelength
ofthesolenoidisdoubledbutthenumberofturnsremainsthesame.
(vi).Defineelectromagnetism.
Note:AttemptanyOne(1)longquestion. (5+5=10)
Q3.(a)Deriveanexpressionfortheforceactingonachargedparticlemoving
inthemagneticfield.
(b)Findthevalueofmagneticfieldthatwillcauseamaximumforceof7.0×10
-3N
ona20.0cmstraightwirecarryingacurrentof10.0A.
Q4.(a)Deriveanexpressionfortheforceactingonacurrentcarryingconductor
whichisplacedinauniform magneticfield.
(b)Acoilof0.1m×0.1m andof200turnscarryingacurrentof1.0mAisplacedina
uniformmagneticfieldof0.1T.Calculatethemaximumtorquethatactsonthecoil.

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GreenHallAcademy

TestSession~2 020 TotalMarks: 25

Name: Class: 2 ndyear Date: 21 - January- 2019

Test:Physics Chapter:^14 (Electromagnetism(^1

st

Half)) TimeAllowed: 50 minutes

MultipleChoiceQuestions(MCQ's).

Q 1 .Encircleortickthecorrectanswer. ( 1 ×5=5)

(i).Themagneticforceissimplya: (a)reflectingforce (b)deflectingforce (c)restoringforce (d)gravitationalforce (ii).Theunitofmagneticfluxis: (a)weber (b)henry (c)coulomb (d)tesla (iii).Acurrentcarryingconductorissurroundedby: (a)gravitationalfield (b)conservativefield (c)magneticfield (d)electricfield (iv).Themagneticfieldinsideacurrentcarryinglongsolenoidis: (a)nonuniform (b)weak (c)uniform&steady (d)zero (v).Ifacurrentflowsfromtoptobottomthroughawirethenthedirectionoflinesofforcewouldbe: (a)paralleltowire (b)perpendiculartowire (c)clockwise (d)anticlockwise

Q 2 .WriteShortanswerstoanyfive( 5 )questions. ( 2 × 5 = 10 )

(i).Givedimensionsofpermeabilityoffreespace. (ii).Explainrighthandruletofindthedirectionoflinesofmagneticfield. (iii).Ifachargedparticlemovesinastraightlineinacertainregionofspace,canyousaythatthe magneticfieldintheregioniszero? (iv).WhatisLorentzforce?Writeitsmathematicalexpression. (v).DescribethechangeinthemagneticfieldinsideasolenoidcarryingasteadycurrentI,ifthelength ofthesolenoidisdoubledbutthenumberofturnsremainsthesame. (vi).Defineelectromagnetism.

Note:AttemptanyOne( 1 )longquestion. (5+5=1 0 )

Q 3 .(a)Deriveanexpressionfortheforceactingonachargedparticlemoving

inthemagneticfield.

(b)Findthevalueofmagneticfieldthatwillcauseamaximumforceof 7. 0 × 10

  • 3

N

ona 20. 0 cmstraightwirecarryingacurrentof 10. 0 A.

Q 4 .(a)Deriveanexpressionfortheforceactingonacurrentcarryingconductor

whichisplacedinauniformmagneticfield.

(b)Acoilof 0. 1 m× 0. 1 m andof 200 turnscarryingacurrentof 1. 0 mAisplacedina

uniformmagneticfieldof 0. 1 T.Calculatethemaximumtorquethatactsonthecoil.