Jan 27, 2009 #1 D DanielleC Member Joined May 21, 2008 Messages 34 Reaction score 0 Points 6 the location x = 30.0 cm? A point charge of 9.0 10-9 C is located at the origin. How much work is required to bring a positive charge of 1.0 10-9 C from infinity to the location x = 30.0 cm?
the location x = 30.0 cm? A point charge of 9.0 10-9 C is located at the origin. How much work is required to bring a positive charge of 1.0 10-9 C from infinity to the location x = 30.0 cm?
Jan 27, 2009 #2 B Borodin New member Joined Jan 27, 2009 Messages 1 Reaction score 0 Points 1 take the integral with respect to r from infinity to 30 cm of kq1q2/r^2.
Jan 27, 2009 #3 B brokensymmetry1 New member Joined Jan 27, 2009 Messages 2 Reaction score 0 Points 1 dW = F?dr = k*q1*q2/r^2 dr =-k*q1*q2(1/? - 1/0.3) =9.0 x 109 N • m2 / C2*9.0 10-9 C*(-9.0 10-9 C)/0.3 = -0.00000243 Joule
dW = F?dr = k*q1*q2/r^2 dr =-k*q1*q2(1/? - 1/0.3) =9.0 x 109 N • m2 / C2*9.0 10-9 C*(-9.0 10-9 C)/0.3 = -0.00000243 Joule