Homework Help: College physics

Posted by Emoni on Wednesday, July 14, 2010 at 7:00pm.

Two 2.4 cm diameter disks spaced 1.5 mm apart form a parallel-plate capacitor. The electric field between the disks is 4.3×10^5 V/m.
What is the voltage across the capacitor?
How much charge is on each disk?
An electron is launched from the negative plate. It strikes the positive plate at a speed of 2.3×10^7 m/s. What was the electron's speed as it left the negative plate?

College physics - Drwls, Wednesday, July 14, 2010 at 11:31pm
E x d is the voltage
d is the plate separation

Use Gauss' Law or Q = CV for the charge

The change in kinetic energy equals e V

Answer this Question

Related Questions

Physics - A parallel-plate capacitor consists of two square plates 18 Cm on a ...
College Physics 2 - A parallel-plate air capacitor is made from two plates 0.250...
physics parallel plate - A proton traveling at a speed 1.0*106 m/s of enters the...
College Physics - A 12.0- A 12.0- A 12.0-V battery remains connected to a ...
physics - I have no clue: Two parallel plate capacitors have circular plates. ...
PHYSICS - In the early 1900s, Robert Millikan used small charged droplets of oil...
College physics - Open Question: Find the electric field between the plates of a...
physics - Two parallel plates, separated by 10 mm, are charged to a potential ...
physics - The magnitude of the electric field between two plates of a parallel ...
Physics - The potential difference between the plates of a parallel plate ...

For Further Reading

First Name:
School Subject:
Answer: