H1 Electric Fields-solutions.pdf - wong(lw27737 H1 Electric Fields avram(1402 This print-out should have 23 questions Multiple-choice questions may

H1 Electric Fields-solutions.pdf - wong(lw27737 H1 Electric...

This preview shows page 1 - 3 out of 9 pages.

wong (lw27737) – H1 Electric Fields – avram – (1402)1Thisprint-outshouldhave23questions.Multiple-choice questions may continue onthe next column or page – find all choicesbefore answering.00110.0pointsA plastic rod is rubbed against a wool shirt,thereby acquiring a charge of4.9μC.How many electrons are transferred fromthe wool shirt to the plastic rod? The elemen-tal charge is 1.6×1019C.Correct answer: 3.0625×1013.Explanation:Let :q=4.9μC =4.9×106Cande=1.6×1019C.The total charge isq=neene=qe=4.9×106C1.6×1019C=3.0625×1013.00210.0pointsWhenapositivelychargedconductortouches a neutral conductor, the neutral con-ductor will1.stay neutral.2.lose electrons.correct3.gain protons.4.gain electrons.5.lose protons.Explanation:When the two conductors touch, the elec-trons in the neutral conductor will move overto the positively charged conductor, since thelatter defines a region of higher potential thanthe neutral conductor.00310.0pointsTwo uncharged metal balls,ZandX, standon insulating glass rods. A third ball, carryinga positive charge, is brought near the ballXas shown in the figure. A conducting wire isthen run betweenZandXand then removed.Finally the third ball is removed.XZ+conducting wireWhen all this is finished1.ballZis positive and ballXis negative.correct2.ballZis negative and ballXis neutral.3.ballZis negative and ballXis positive.4.ballZis neutral and ballXis positive.5.ballZis positive and ballXis neutral.6.ballZis neutral and ballXis negative.7.ballsZandXare still uncharged.8.ballsZandXare both negative, but ballXcarries more charge than ballZ.9.ballsZandXare both negative, but ballZcarries more charge than ballX.10.ballsZandXare both positive.Explanation:When the conducting wire is run betweenZandX, some positive charge flows fromXtoZunder the influence of the positive chargeof the third ball.Therefore, after the wire is removed,Zischarged positive andXis charged negative.00410.0pointsTwo electrostatic point charges of +53.0μCand +56.0μC exert a repulsive force on each
Background image
wong (lw27737) – H1 Electric Fields – avram – (1402)2other of 177 N.Whatisthedistancebetweenthetwocharges? The value of the Coulomb constantis 8.98755×109N·m2/C2.Correct answer: 0.388209 m.Explanation:Let :q1= 53.0μC,q2= 56.0μC,Fe= 177 N,andkC= 8.98755×109N·m2/C2.Fe=kCq1q2r2r=radicalbiggkCq1q2Fe=radicalBig8.98755×109N·m2/C2×radicalbigg(5.3×105C) (5.6×105C)177 N=0.388209 m.00510.0pointsA charge of +1.5×109C is placed at theorigin, and another charge of +5.9×109Cis placed atx= 2.4 m.At what point between these two chargeswhereachargeof+3.7×109Cshouldbeplacedsothatthenetelectricforceon it is zero?The Coulomb constant is8.98755×109N·m2/C2.
Background image
Image of page 3

You've reached the end of your free preview.

Want to read all 9 pages?

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern

Stuck? We have tutors online 24/7 who can help you get unstuck.
A+ icon
Ask Expert Tutors You can ask You can ask You can ask (will expire )
Answers in as fast as 15 minutes