A charge of 7C isdistributed uniformly along the circumference of a circle with

Question

A charge of 7C isdistributed uniformly along the circumference of a circle with aradius of 56 cm.The Coulomb constant is 8.98755 × 109 N · m2/C2.How much external energy is required to bring a charge of33 C from infinity to the center of the circle? Answer inunits of J. i have no idea how to solve A charge of 7C isdistributed uniformly along the circumference of a circle with aradius of 56 cm.The Coulomb constant is 8.98755 × 109 N · m2/C2.How much external energy is required to bring a charge of33 C from infinity to the center of the circle? Answer inunits of J. i have no idea how to solve i have no idea how to solve

Explanation / Answer

The electrostatic potential energy is the energy of anelectrically charged particle (at rest) in an electric field. It isdefined as the work that must be done to move it from an infinitedistance away to its present location, in the absence of anynon-electrical forces on the object. This energy is non-zero ifthere is another electrically charged object nearby. Given :           q1   = 7 x 10-6  C           q2   = 33 x 10-6  C           k     ˜   9 x 109 N - m2 /C2 Hence                  U   =   k q1 q2 / r                         =  ( 9 x 109 * 7 x 10-6 * 33 x 10-6  ) / 56 x 10-2 m                        = 3.712    J Hope this helps u!

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