physics

posted by .

A simple Geiger counter is constructed out of a setup similar to what we just
used in problem 5. A thin wire with a linear charge density _ is held in the
center of a cylindrical tube, which is filled with an inert gas. When a high speed
2
particle coming from a radioactive decay, cosmic ray, etc. enters the gas-filled
tube, collisions with the gas knock electrons off of their atoms. The free electrons
then accelerate towards the positively charged wire, and collide with other gas
atoms causing them to lose electrons as well. This leads to a cascade of electrons
accelerating towards the wire, which will be turned into a measurable current
upon reaching the wire. For this problem, the tube has a radius of 1cm and is
10cm long; the wire has a radius of 10_m and _ = 10��8C=m.
(a) What is the force on a free electron located at the outer wall of the tube?
(b) What is the force on an electron immediately next to the thin wire?
(c) What is the work done on an electron pulled from the outer wall of the tube
to the wire?
(d) Calculate the electric flux through the walls of the tube perpendicular to the
wire (i.e. the walls the wire is attached to).
(e) Calculate the electric flux through the surface of the tube parallel to the
wire. Would this value change if the Geiger counter were box shaped rather
than cylindrical?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. physics!!!

    A small spherical insulator of mass 8.00*10^-2kg and charge +6.00*10^-7C is hung by a thin wire of negligible mass. A charge of -9.00*10^-7C is held 0.450m away from the sphere and directly to the right of it, so the wire makes an …
  2. physics!!!!!

    A small spherical insulator of mass 8.00*10^-2kg and charge +6.00*10^-7C is hung by a thin wire of negligible mass. A charge of -9.00*10^-7C is held 0.450m away from the sphere and directly to the right of it, so the wire makes an …
  3. physics

    a thin wire with linear charge density _ is surrounded by a conducting cylindrical shell. (a) If the electric field must be zero inside a conductor, is the electric field due to the wire shielded from extending beyond the conducting …
  4. Physics Gauss

    A long, thin straight wire with linear charge density -λ runs down the center of a thin, hollow metal cylinder of radius R. The cylinder has a net linear charge density 2λ. Assume λ is positive. Find expressions for …
  5. physics

    A long, thin straight wire with linear charge density -λ runs down the center of a thin, hollow metal cylinder of radius R. The cylinder has a net linear charge density 2λ. Assume λ is positive. Find expressions for …
  6. Physics

    A long, straight wire has a uniform linear charge density of 7.50X10^-4 C/m. A point charge q=15.0 microcoulombs is located 4.50 cm away from the wire. Find the magnitude of the force exerted by the charge q on the wire.
  7. Physics

    A long, straight wire has a uniform linear charge density of 7.50X10^-4 C/m. A point charge q=15.0 microcoulombs is located 4.50 cm away from the wire. Find the magnitude of the force exerted by the charge q on the wire.
  8. physics

    A large rock that weighs 164.0 N is suspended from the lower end of a thin wire that is 3.00 m long. The density of the rock is 3200 kg/m^3. The mass of the wire is small enough that its effect on the tension in the wire can be neglected. …
  9. Physics

    A large rock that weighs 164.0 N is suspended from the lower end of a thin wire that is 3.00 m long. The density of the rock is 3200 kg/m3. The mass of the wire is small enough that its effect on the tension in the wire can be neglected. …
  10. Physics

    A charge of uniform linear density 2.89 nC/m is distributed along a long, thin, nonconducting rod. The rod is coaxial with a long conducting cylindrical shell with an inner radius of 6.23 cm and an outer radius of 15.5 cm. If the net …

More Similar Questions