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## A charge of +3.0 µC is distributed uniformly along the circumference of a circle with a radius of 20 cm. How much external energy is require

Question

A charge of +3.0 µC 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 25µC from infinity to the center of the circle?

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Physics
2 months
2021-07-31T21:20:52+00:00
2021-07-31T21:20:52+00:00 2 Answers
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## Answers ( )

Answer:The energy required is

Explanation:From the question we are told that

The charge is

The radius is

The second charge is

Generally the energy required is mathematically represented as

Where k is the coulomb constant with a value of

Substituting values we have

Answer:

3.37×10^6J

Explanation:

The external energy is given as KQ1Q2/r

=(9*10^9)*(3*10^-3)*(25*10^-3)/(0.2)

=3.375 *10^6 J