Question

What minimum work must be done by an external force to bring a charge q = 3.00 uC from a
great distance away (take r = infinite) to a point 0.500 m from a charge Q = 20.0 uC?​

Answer 1

Answer:

hope it helps !!...❣️

Answer 2

Answer:

w = 3×$10^{-6}$ J , w =1.08J

Explanation:

given,  

• charge q = 3.00 uC

• great distance away (take r = infinite) to a point 0.500 m from a charge Q = 20.0 uC

to find,

    work done by external force

solution,

•  W (external) = q Δv

                    =q (v₀ - v∞)

                    =q (k Q/r)

                      w = 3×$10^{-6}$ J

• W (external) = q Δv
•                     =q (v₀ - v∞)
•                     =q (k Q/r)
•                     = 3×$10^{-6}$×g×$10^{g}$×20×$10^{-6}$/0.5

                 W   =1.08J