- #1

Kudo Shinichi

- 109

- 1

**HELP!A problem on electricity?**

## Homework Statement

A Geiger counter consists of a metal cylinder 2.0 cm in diameter along whose axis is stetched a wire 0.013 cm in diameter. If 850 volts are supplied between them, what is the electric field strength at the surface of a) the wire and b) the cylinder?

## The Attempt at a Solution

I know the formula v=-E*d

v=voltage

E=electric field

d= distance between the charges where we are looking for potential difference

since I am given v

so, 850=-E*d

the problem also provides the diameter for both cylinder and wire, I can use them to get the length if I know either the area or volume for both of them. However, I don't, so is there any other way to get the length for both objects to solve for electric field?

Thank you very much