Physics Help Forum electric fields
 User Name Remember Me? Password

 Advanced Electricity and Magnetism Advanced Electricity and Magnetism Physics Help Forum

 Jan 17th 2009, 10:41 AM #1 Junior Member   Join Date: Jan 2009 Posts: 22 electric fields A tiny Styrofoam ball of mass 0.5 g is suspended by a light thread of negligible mass. The ball is electrically charged with charge, q. A uniform, horizontal electric field of 400 N/C is then turned on and the ball is deflected through an angle of 150. What is charge, q?
Jan 18th 2009, 06:37 PM   #2
Senior Member

Join Date: Apr 2008
Location: HK
Posts: 886
 Originally Posted by physics123456 A tiny Styrofoam ball of mass 0.5 g is suspended by a light thread of negligible mass. The ball is electrically charged with charge, q. A uniform, horizontal electric field of 400 N/C is then turned on and the ball is deflected through an angle of 150. What is charge, q?
I find a very good website for this kind of problem. You should click the help button and you will be guided step by step.
ie 01/p5new

You may first draw the free body diagram, drawing all forces(weight, force on charge and the tension).Given the electric field, you can let the force be 400q. As it is in equilibrium, the forces in x-y-planes are the same. You can find the unknown you want.

 Tags electric, fields

Search tags for this page

### an charged ball is suspended with threads of negligible mass

Click on a term to search for related topics.
 Thread Tools Display Modes Linear Mode

 Similar Physics Forum Discussions Thread Thread Starter Forum Replies Last Post emily36 Electricity and Magnetism 0 Jan 13th 2013 12:22 PM ZergLurker Advanced Electricity and Magnetism 2 Feb 24th 2010 12:55 AM Apprentice123 Advanced Electricity and Magnetism 8 May 17th 2009 01:20 PM LS09 Electricity and Magnetism 1 Feb 6th 2009 09:20 PM soccerdude28 Advanced Electricity and Magnetism 0 Nov 1st 2008 11:58 AM