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Magnetic field problem

  • Thread starter jonno426
  • Start date
3
0
1. Homework Statement
In an experiment you find that a small styrofoam ball of mass m can be suspended in mid-air by an electric field of magnitude c pointing straight downward, towards the earth.

Its looking for the charge on the styrofoam ball, and I have no equation to help me solve for it.


2. Homework Equations
Lol thats what I'm lookin for.


3. The Attempt at a Solution
:yuck:
 

Answers and Replies

Hootenanny
Staff Emeritus
Science Advisor
Gold Member
9,598
6
What is the equation for the force experienced by a charge q in an electric field E?
 
3
0
k(q1)(q2) / l^2?
 
ranger
Gold Member
1,654
1
k(q1)(q2) / l^2?
You are given the magnitude of the E field. Note that much emphasis was placed on q and E. The force is proportional to product of two things...
 

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