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Posted by on Friday, June 14, 2013 at 3:30pm.

Two charged particles initially are traveling in the positive x direction, each with the same speed v, and enter a non-zero magnetic field at the origin O. The magnetic field for x>0 is constant, uniform and points out of the page. In the magnetic field, their trajectories both curve in the same direction, but describe semi-circles with different radii. The radius R2 of the semi-circle traced out by particle 2 is bigger than the radius R1 of the semi-circle traced out by particle 1, and R2R1=7.09. Note that the drawing is not to scale, so the ratio of radii may not be represented accurately. Assume that the particles are sent through at different times so that they do not interact with each other.

(a) Assume that the two particles have the same mass m, but have different charges, q1 and q2. What is the ratio q2q1?


(b) How much energy did the particle with charge q2 gain traversing the region with magnetic field?


(c) Assume that instead of different charges as shown in the figure, the two particles have the same charge q, but have different mass m1 and m2. What is the ratio m2m1?

  • Physics - , Saturday, June 15, 2013 at 2:48am

    b) 0

  • Physics - , Saturday, June 15, 2013 at 4:25am

    thanks a lot phy. any idea about the rest/some others?

  • Physics - , Saturday, June 15, 2013 at 4:47am

    No, do you have any idea for others problems?

  • Physics - , Saturday, June 15, 2013 at 4:57am

    I got 4th problem

  • Physics - , Saturday, June 15, 2013 at 5:19am

    Please Phy 4th sol?

  • Physics - , Saturday, June 15, 2013 at 5:42am

    B=n*E_0/c

    wavelength= 2*pi*c/(n*omega)

    Direction -z and -y

  • Physics - , Saturday, June 15, 2013 at 6:11am

    Thanks Phy!

  • Physics - , Saturday, June 15, 2013 at 9:46am

    This wave is traveling through a medium whose index of refraction is 1.3.
    E= 2.8 xsin(2*π/lamdaz + 1.19e16) t V/m
    B =B_0sin(2*π/lamdaz + 1.19e16 t) Tesla

    Please tel ans for this phy.

  • Physics - , Saturday, June 15, 2013 at 10:58am

    2, 3, 5, 7 ,8 pls Phy

  • Physics - , Saturday, June 15, 2013 at 1:49pm

    No i didn't get them yet, I'll tell you when i get those, can u tell me the solutions of 1,4,6,9,10,11,12?

  • Physics - , Saturday, June 15, 2013 at 1:59pm

    P, these are the answers-

    1.2133e-8
    1.21845e-7

  • Physics - , Saturday, June 15, 2013 at 4:16pm

    E⃗ = 8.6 xˆsin(2πλz + 5.91e16 t) V/m
    B⃗ = Bo⃗ sin(2πλz + 5.91e16 t) Tesla

    o can you explain the formula what is n, c and omega?

  • Physics - , Saturday, June 15, 2013 at 5:54pm

    a) q2/q1 = R1/R2
    b) 0
    c) R2/R1

  • Physics - , Sunday, June 16, 2013 at 8:20am

    Phy, do you have problem 8?

  • Physics - , Sunday, June 16, 2013 at 10:47am

    robbo ppls tell what are the formulas for which you have posted.

  • Physics - , Sunday, June 16, 2013 at 10:48am

    Phy thanks for the ans I have ans for Q3 a=0 and last part =0

  • Physics - , Sunday, June 16, 2013 at 11:45am

    P, just trust me and go for the answers with the solns provided. We barely have time, so let's get together and solve the other remaining questions.

  • Physics - , Sunday, June 16, 2013 at 11:47am

    Who's got the capacitor brush problem and the LC circuit???

  • Physics - , Sunday, June 16, 2013 at 12:24pm

    Q3, 3rd and 4th

    I=V/R

  • Physics - , Sunday, June 16, 2013 at 11:15pm

    Phy I think you are not quite right.

    Any right answer for the transient

  • Physics - , Sunday, June 16, 2013 at 11:30pm

    ans for Q3 2
    V/R(1-e^-(R*t/L))
    5
    V/R*e^-(t/(R*C))

  • Physics - , Monday, June 17, 2013 at 3:09am

    Q 7 please

  • Physics - , Monday, June 17, 2013 at 3:45am

    Q7
    look at the maxima peak and the location of the minimum. count off the peaks.
    ( ist maxima and minima.)

    Anyone for the capacitor and sphere problem? Thnks.

  • Physics - , Monday, June 17, 2013 at 8:54am

    Anonymous what is t in Q3 b

  • Physics - , Monday, June 17, 2013 at 10:47am

    Someone cant help me to resolve a) and c)for the original post Thanks

  • Physics - , Monday, June 17, 2013 at 3:28pm

    Answer for a) & c) Q10

  • Physics - , Monday, June 17, 2013 at 4:55pm

    answer for c is 3.91

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