# Physics

posted by .

The Earth has an electric field with magnitude roughly 100 N/C at its surface.
A) Assuming there is a point charge at the earth's center creating this field, how much charge does the earth posses? Treat the earth as a sphere of radius 6.37 * 10^6 m.
B)As the earth orbits the sun,this charge moves and therefore creates a magnetic field. If we assume the earth moves on a circle ( whihc is approximately true) we can use the eqn for a current loop, B =(miu)I/2R, to find the magnetic field created by the earth( by the way, this is completely unrelated to the earth's North and south magnetic poles!) but first, find the current created by the earth as ut circles the sun.
HINT: I= Q/(delta)t. Think of a cross section of the earth' orbit. How often does a charge pass through it?
C) Using the earth sun distance , R= 1.5 * 10^11 m, calculate the magnetic field created by earth as it circles the sun.

• Physics -

A. E=kQ/r

B. The current earth creates is Q/timeofonerevolution. Ignore the hint, charges don't pass through the orbit.

• Physics -

charge dose (450.85)*10^3

## Similar Questions

1. ### Physics

The Earth is surrounded by an electric field on its surface that points toward the center of the Earth with an average magnitude of 150 N/C. If there is an electron that is released in vacuum at the Earth’s surface, what will the …
2. ### Physics

The Earth is surrounded by an electric field on its surface that points toward the center of the Earth with an average magnitude of 150 N/C. If there is an electron that is released in vacuum at the Earth’s surface, what will the …
3. ### physics

1. Measurements show that there is an electric field surrounding the Earth. Its magnitude is about 100 N/C at the Earth's surface and points inward toward the Earth's center. From this information, can you state whether the Earth is …
4. ### Physics-Totally lost

I'm totally lost on this one- the earth is surrounded by an electric field with a strenth of 100 N/C at the surface. Its electric properties are the same as a point charge located at its center. How would the gravatational force and …

I don't want someone to do this for me-I'm just totally lost and don't even know where to start-I'm totally lost on this one- the earth is surrounded by an electric field with a strenth of 100 N/C at the surface. Its electric properties …
6. ### Physics

Calculate the electric field which must be applied vertically to hold an electron steady in the earth’s gravitational field. Assume that the charge to mass ratio of the electron is 1.758×1011 C kg-1 and that the acceleration due …
7. ### Physics

At the heighest point on earth, the distance to the center of the earth is approximately equal to 1.0014 times the radius of the earth. What would be in N/kg the magnitude of the gravitational field (g) due to the earth at that position?
8. ### physics

The auroral zone is defined by the last field line from the Earth that returns to the Earth. If the field of the earth extends no further than 10RE in the sunward direction, at what angle (in degrees) in the picture above does the …
9. ### physic

During fair weather, an electric field of about 100 N/C points vertically downward into the earth's atmosphere. Assuming that this field arises from charge distributed in a spherically symmetric manner over the surface of the earth, …
10. ### physics

Assuming the Earth's magnetic field averages about 0.50×10−4 T near Earth's surface, estimate the total energy stored in this field in the first 15km above Earth's surface. The radius of Earth is 6380 km.

More Similar Questions