Physics Help Forum Electrostatic force,electric field,electric potential,electric flux

 Electricity and Magnetism Electricity and Magnetism Physics Help Forum

 Jul 23rd 2010, 10:19 PM #1 Junior Member   Join Date: Nov 2009 Posts: 7 Electrostatic force,electric field,electric potential,electric flux Cube: 10 cm each side Each q at the corner of the cube is +100 sc. Find: a) magnitude and direction of the electrostatic force at the center of the cube. b) magnitude and direction of the electric field at the center of the cube of tq in place at this pt. c) find the electric potential and work done if tq of 1000 sc is placed at the center of the cube. d) what is the electric flux at the center of the cube. My Solution: a) Sq1q9 = square root of (5 cm)^2+(5 cm)^2 = 7.07 cm S29,S39,S49,S59,S69,S79,S89= 7.07 cm Fq1q9=k[q1q9/(s19)^2 =1 dyne cm^2/sc^2[(100sc)(100sc)/(7.07cm)^2] = 200.08 dyne Fq29,Fq39,Fq49,Fq59,Fq69,Fq79,Fq89= 200.08 dyne x and y components x axis Fq19 = -200.08 dyne Fq29 = 0 Fq39 = 200.08 dyne Fq49 = 0 Fq59 = 0 Fq69 = 200.08 dyne Fq79 = 0 Fq89 = -200.08 dyne y axis c. V= 1 dyne cm^2/sc^2(100/7.07)x8 V= 113.12 dyne. cm d. Eq = 800 sc x 1 C/1x10^9 sc = 8x10^-7 C electric flux = 8x10^-7 C/8.85x10^-12 C^2/Nm^2 electric flux = 90,395.48 Nm^2/C I can't answer letter a and b because I don't know how will I draw the free bodied diagram of it. I attach a drawing so you can see where I place the charges. I hope you can help me thanks Attached Thumbnails

 Tags electric, electrostatic, field, flux, force, potential

 Thread Tools Display Modes Linear Mode

 Similar Physics Forum Discussions Thread Thread Starter Forum Replies Last Post Punch Electricity and Magnetism 1 Jul 22nd 2011 09:33 AM tajima Electricity and Magnetism 2 Feb 14th 2011 12:09 PM quantum_enhanced Electricity and Magnetism 1 Jan 27th 2011 06:44 AM tag16 Electricity and Magnetism 0 Oct 12th 2009 04:23 PM Rainy2Day Advanced Electricity and Magnetism 0 Feb 9th 2009 03:10 PM