Tuesday
September 30, 2014

Homework Help: Physics E&M

Posted by Spencer on Tuesday, February 19, 2008 at 8:48pm.

A Geiger counter detects radiation such as alpha particles by using the fact that the radiation ionizes the air along its path. A thin wire lies on the axis of a hollow metal cylinder and is insulated from it. View Figure A large potential difference is established between the wire and the outer cylinder, with the wire at a higher potential; this sets up a strong electric field directed radially outward. When ionizing radiation enters the device, it ionizes a few air molecules. The free electrons produced are accelerated by the electric field toward the wire and, on the way there, ionize many more air molecules. Thus a current pulse is produced that can be detected by appropriate electronic circuitry and converted into an audible click. Suppose the radius of the central wire is 145 micrometers and the radius of the hollow cylinder is 1.80 centimeters.

What potential difference V_wc between the wire and the cylinder produces an electric field of 2.00e^4 volts per meter at a distance of 1.20 centimeters from the axis of the wire? (Assume that the wire and cylinder are both very long in comparison to their radii.)

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

long physics E&M - A Geiger counter detects radiation such as alpha particles by...
ASTRONOMY-HELP PLEASE!!!!! - Equipment:      Geiger counter.    Laboratory ...
nuclear chem - which of the following choices correctly describes the decreasing...
chemistry - Which of the following statements about UV radiation is/are FALSE? (...
Science radioactivity - why are alpha and beta radiation referred to as ...
Chemistry - 27. Excess exposure to nuclear radiation can cause harm. All of the ...
physics - Human skin (choose all that apply) 1. emits radiation well. 2. ...
college physics - Human skin (choose all that apply) 1. emits radiation well. 2...
Physics - for gamma radiation 1rad=1rem, but for alpha radiation 1 rad=20rem. ...
chemistry - Technetium-99m emits only gamma radiation. Why would this type of ...

Search
Members