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

question 6

Multiple Choice

A charge of +3.0 $\mu$ 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 $\mu$ C from infinity to the centre of the circle?

• A)5.4 J
• B)3.4 J
• C)4.3 J
• D)2.7 J
• E)6.8 J

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