posted by .

The area shown is the boundary of a magnetic field directed in the positive z direction. An electron with a velocity along the
x-axis enters the field at coordinates (x, y) =
(−2 m, 0) and exits 0.35 µs later at point A
whose coordinates are (x, y) = (0, 2 m).
What is the magnitude of B~
? The mass
of the electron is 9.109 × 10
kg and the
elemental charge is −1.602 × 10
Answer in units of µT

  • physics -

    Electron enters the magnetic field perpendicular to the magnetic field, therefore, it moves with centripetal acceleration along the curvilinear path due to Lorentz force action
    m•a=q•v•B •sin α.
    Since α=90º, sin α=1; q=e; v=at.=>
    m•a =e•v•B=e•a•t•B =>
    m= e•t•B.
    =9.109•10^-31/1.602•10^-19•0.35•10^-6 =1.62•10^-5 T =16.2 μT

  • physics -


Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. physics

    Two positive charges of 5.43 µC each are 508 cm apart. Find the electric field midway between them. What is the magnitude of the electric field if one charge is positive and the other negative, both of magnitude 5.43 µC?
  2. Physics

    Consider a disk of radius 2.6 cm with a uniformly distributed charge of +3.6 µC. Compute the magnitude of the electric field at a point on the axis and 3.3 mm from the center. The value of the Coulomb constant is 8.98755 × …
  3. Physics

    An electron and a proton are each placed at rest in an electric field of 363 N/C. What is the velocity of the electron 76.1 ns after being released?
  4. physics

    Three charges are located on a horizontal axis. 12 µC −0.8 µC 12 µC p 1.69656 m 2.9 m 2.9 m Determine the magnitude of the electric field at p, vertically above the charge −0.8 µC as shown in the figure. …
  5. physics

    The electrons in a beam are moving at 2.8 × 108 m/s in an electric field of 17000 N/C. What value must the magnetic field have if the electrons pass through the crossed fields undeflected?
  6. physics

    A singly charged positive ion has a mass of 3.35 × 10−26 kg. After being accelerated through a potential difference of 128 V, the ion enters a magnetic field of 0.784 T, in a direction perpendicular to the field. …
  7. Physics

    A coil with 347 turns of wire, a total resistance of 49 Ω, and a cross-sectional area of 0.28 m2 is positioned with its plane perpendicular to the field of a powerful electromagnet. What average current is induced in the …
  8. physics

    Thunderstorms can have an electric field of up to 341 × 10 ^5 N/C. What is the magnitude of the electric force on an electron in such a field?
  9. physics

    A uniform 5.9 T magnetic field points north. If an electron moves vertically downward (toward the ground) with a speed of 0.85 × 107 m/s through this field. The charge on a proton is 1.60×10−19 . a) What is the …
  10. Physics

    Consider the following model for the electrostatic stretching of DNA. A spring with spring constant kDNA = 250 pN/m is tethered to an immobile surface on one end and a charge of qDNA = −350e on the other. A uniform electric field …

More Similar Questions