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torisob [31]
3 years ago
14

How much work must be done to bring three electrons from a great distance apart to within 9.0 × 10-10 m from one another (at the

corners of an equilateral triangle)?
Physics
1 answer:
ludmilkaskok [199]3 years ago
5 0

As we know that change in the potential energy of the system must be equal to the work done to bring the system of charges

here we know that

U = 3\frac{kq_1q_2}{r^2}

also here we have

q_1 = q_2 = 1.6 \times 10^{-19} C

r = 9 \times 10^{-10} C

now we will have

U = \frac{9 \times 10^9 (1.6 \times 10^{-19})^2}{(9\times 10^{-10})^2}

U = 2.84 \times 10^{-10} J

So here work done to bring three charges at the vertices of a triangle is given as

W = 2.84 \times 10^{-10} J

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