Purchase Solution

# Physics: electric fields and positive charges

Not what you're looking for?

See the attached file.

1. In a radical system the electric potential is given by the function

V(r)=k(1/r2 - 1/r)

Where k is constant and r is the radical distance.

a. Find the electric field as a function of distance.
b. If a positive charge was released in this system, at what radius would it be at equilibrium (i.e. if electric potential was height and you rolled a ball on this landscape would it come to a rest?)

Take the derivative and put it equal to zero.

2. The earth has an electric field of 150N/C which arises because the separation of charge between the Earth's surface and the ionsphere which is 100 km above the surface of the earth. Assuming the Earth's atmosphere can be considered to be similar to a parallel plate capacitor (whose area is the area of the planet) what is the charge stored in this capacitor?

Treat the planet's atmosphere like a parallel plate capacitor. Use the parallel-plate capacitor equations.

##### Solution Summary

The solution discusses the electric fields and positive charges.

##### Solution Preview

See the attached files.

The solution is attached below in two files. the files are identical in content, only differ in format. The first is in MS Word format, while the other is in Adobe pdf format. Therefore you can choose the format that is most ...

##### Classical Mechanics

This quiz is designed to test and improve your knowledge on Classical Mechanics.

##### Variables in Science Experiments

How well do you understand variables? Test your knowledge of independent (manipulated), dependent (responding), and controlled variables with this 10 question quiz.

##### Intro to the Physics Waves

Some short-answer questions involving the basic vocabulary of string, sound, and water waves.

##### The Moon

Test your knowledge of moon phases and movement.