Identical point charges (+50 µC) are placed at the corners of a square with sides of 2.0-m length. How much external energy is required to bring a fifth identical charge from infinity to the geometric center of the square? Answer is 64J please explain how?

Identical point charges (+50 µC) are placed at the corners of a square with sides of 2.0-m length. How much external energy is required to bring a fifth identical charge from infinity to the geometric center of the square? Answer is 64J please explain how?

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter7: Electric Potential

Section: Chapter Questions

Problem 100AP: A point charge of q=50108 C is placed at the center of an uncharged spherical conducting shell of...

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Concept explainers

Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.

Question

Identical point charges (+50 µC) are placed at the corners of a square with sides of 2.0-m

length. How much external energy is required to bring a fifth identical charge from infinity to the

geometric center of the square? Answer is 64J please explain how?

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Step 1: Given information

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Step 2: Show positions of the charges

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Step 3: Find total potential at the center of the square

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Step 4: Find external energy required to bring the fifth charge to center

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