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Homework Help: Could you help me with these questions?(Magnetic field and force)

  1. Apr 22, 2004 #1
    Can any body help me with the solutions of one or more of these questions which are in the Book "University Physics 10th edition" chapter 28, questions: 1,4,9,13,29,57,58 Pleeeeeease

    q1) A particle with a charge of -1.24 x 10(-8) C, is moving with instantaneous velocity v=(4.19x10(4) m/s)i + (-3.85x10(4) m/s)j.
    What's the force exerted on this particle by a magnetic field
    a) B = (1.40 T)i
    b) B = (1.40 T)k?
    q4) A particle with a mass of 1.81x10(-3) kg and a charge of 1.22 x 10(-8) C has at a given instant a velocity v=(3.11 x 10(4) m/s)j. What are the magnitude and direction of the particle's acceleration produced by a uniform magnetic field B= (1.63 T)i + (0.980 T)j?
    q9)A circluar area with a radius of 6.50 cm lies in the xy-plane. What's the magnitude of the magnetic flux through this circle cue to a uniform magnetic field B = 0.230 T
    a) in the +z direction?
    b) at an angel of 53.1 from the +z-direction?
    c)in the +y-direction?
    q13) An electron at point A in figure 38-39 has a speed v0 of 1.41 x 10(6) m/s. Find:
    a) the magnitude and direction of the magnetic field that will cause the electron to follow the semicircular path from A to B;
    b) the time requied for the electron to move from A to B.

    | /-----\
    | / \
    | / \
    |/ \
    O- v
    A B
    <--10.0 cm--->


    q29) A wire along the x-axis carries a current of 3.50 A in the naegative direction. Calculate the force (expressed in terms of unit vectors) on a 1.00 cm section of the wire exerted by these magnetic fields:
    a) B= -(0.65 T)j;
    b) B= +(0.56 T)k;
    c)B= -(0.31 T)i;
    d)B= +(0.33 T)i - (0.28 T)k;
    e) B= +(0.74 T)j - (0.36 T)k.

    and also who has the same book can help me with questions 57 and 58

    I hope to answer these questions today or tomorrow! :(
  2. jcsd
  3. Apr 22, 2004 #2

    Doc Al

    User Avatar

    Staff: Mentor

    Show us what you've done so far and where you got stuck.
  4. Apr 22, 2004 #3
    I want full answer/s for these questions, so I can practising on solving them!

    because the physics exam is coming soon!
  5. Apr 22, 2004 #4
    Or, If you know a website that offers solutions for this book, I'll be glad!
  6. Apr 22, 2004 #5

    Doc Al

    User Avatar

    Staff: Mentor

    Good one! :biggrin:
  7. Apr 22, 2004 #6
    Yes, It's a good one?!
    it's not my home work! Infact, our teacher tells us that the exam in this chapter will be in Only these questions! I'm not lying, I want to practise only!
  8. Apr 22, 2004 #7
    Unless you have tests where you sit and watch someone else do them, us doing it all isn't very good practice.
  9. Apr 24, 2004 #8
    KingNothing, You are right .. You are the king of Nothing!,
    Anyway, I solved all the problems myself except q57 and 58, and fortunately, Our teacher said leave them!

    Thanks you guys for HELPING ME :mad:
    I will think one thousand times before asking another question in this forum!

    and by The way, I'm not specialist in physics, and thanks for god I didn't choose it! it's driving me crazy! or monkey .. Whatever! hope you guys enjoying it :biggrin:

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