D DanielleC Member Jan 27, 2009 #1 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?
B Borodin New member Jan 27, 2009 #2 take the integral with respect to r from infinity to 30 cm of kq1q2/r^2.
B brokensymmetry1 New member Jan 27, 2009 #3 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