A positive charge of 4.0 x (10^-5) C experiences a force of 0.36 N when located at a certain point. What is the
electric field intensity at that point? (Show your work:
Equation, steps and units)

I'm thinking it's 2 you are asked to explain the earth's magnetic field. which is the best reply? 1. the earth's magnetic south is similar to the north pole of a magnet. 2. the earth's core has a strong magnetic charge similar to the south pole of a magnet. 3. the earth's geomagnetic south is similar to the south pole of a magnet. 4. the earth's magnetic charge is not centered at either pole; it varies based on location.