The electron gun in a television tube uses a uniform electric field to accelerate electrons from rest
to 5.0×107 m/s in a distance of 1.2 cm. What is the electric field strength?

  1. 👍
  2. 👎
  3. 👁
  1. Use F = E e = m a, and solve for the field E.
    e is the electron charge and m is the electron mass. Use Coulombs and kg to get an answer for E in Volts per meter (which is the same as Newtons per Coulomb)

    You will need to solve for the acceleration, a, first.

    Use v = sqrt(2 a X) when solving for the acceleration.
    X = 0.12 m
    v = 5*10^7 m/s

    1. 👍
    2. 👎
  2. 2.3e12

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. physics

    An electron is released from rest in a uniform electric field and accelerates to the north at a rate of 115 m/s2. What are the magnitude and direction of the electric field.

  2. physics

    an electron enters the region of a uniform,electric field with 3X10^6m/s and e=200 N/C . the horizontal length of the plates is 0.100m. a) find the acceleration of the electron while it is in the electric field . b) if the

  3. physics

    How strong an electric field is needed to accelerate electrons in a TV tube from rest to one-tenth the speed of light in a distance of 4.9 cm ?

  4. math/physics

    An electron moving through an electric field experiences an acceleration of 6.1 multiplied by 103 m/s2. (a) Find the electric force acting on the electron. (b) What is the strength of the electric field?

  1. physics

    an electron with a speed of 5.00 x 10^8 cm/s enters an electric field of magnitude 1.00 x 10^3 N/C, traveling along field lines in the direction that s its motion. a) How far will the electron travel in the field before stopping

  2. Physics

    An electron is projected into a uniform electric field E = (1000 N/C)i with an initial velocity (2.00* 10^6m/s)i in the direction of the field. How far the electron travel before it is brought momentarily to rest?

  3. Physics

    The figure below shows an electron passing between two charged metal plates that create an 115 N/C vertical electric field perpendicular to the electron’s original horizontal velocity. (These can be used to change the

  4. Physics

    "An alpha particle (a helium nucleus) is traveling along the positive x-axis at 1 250 m/s when it enters a cylindrical tube of radius 0.500 m centered on the x axis. Inside the tube is a uniform electric field of 4.50 X 10^-4 N/C

  1. Physics

    An electron is projected with an initial speed of (1.6x10^6 m/s) into the uniform field between two parallel plates. Assume that the field between the plates is uniform and directed vertically downward, and that the field outside

  2. Physics

    In a television picture tube, electrons are accelerated by thousands of volts through a vacuum. If a television set were laid on its back, would electrons be able to move upward against the force of gravity? What potential

  3. physics

    An electron is accelerated through a uniform electric field of magnitude 2.5 3 102 N/C with an initial speed of 1.2 3 106 m/s parallel to the electric field, as shown in Figure 10. (a) Calculate the work done on the electron by

  4. physics

    On average, the electron and proton in a hydrogen atom are separated by a distance of (5.3 x 10 -11 m), assuming the orbit of the electron to be circular, (a) what is the electric force on the electron? and (b) WHat is the

You can view more similar questions or ask a new question.