A charge of +3.0 $\pm$C is distributed uniformly along the circumference of a circle with a radius of 20 cm.How much external energy is required to bring a charge of 25$\pm$C from infinity to the center of the circle?
A)5.4 J
B)3.4 J
C)4.3 J
D)2.7 J
E)6.8 J

Question

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The Answer of A charge of +3.0 $\pm$C is distributed uniformly along the circumference of a circle with a radius of 20 cm.How much external energy is required to bring a charge of 25$\pm$C from infinity to the center of the circle?
A)5.4 J
B)3.4 J
C)4.3 J
D)2.7 J
E)6.8 J

A Charge of +3 ±\pm± C Is Distributed Uniformly Along the Circumference of a Circle

A Charge of +3 $\pm$ C Is Distributed Uniformly Along the Circumference of a Circle