Concept explainers
Shown below are three separate pairs of point charges, pairs A, B, and C. Assume the pairs interact only with each other. Rank the magnitudes of the force between the pairs, from largest to smallest.
To rank: The magnitudes of the force between the pairs of point charges, from largest to smallest.
Answer to Problem 26A
C>B>A
Explanation of Solution
Given:
Two-point charges and the distance in between them is shown in below figure.
Formula used:
The electrical force applied by one charge on the other one is calculated as
Calculation:
The electrical force in A is
This force is attractive.
The electrical force in B is
This force is repelling.
The electrical force in C is
This force is attractive.
Conclusion:
Thus, if the magnitude of all cases is considered, then in terms of the magnitude of electrical forces between two charges, ranking from largest to smallest is C>B>A.
Chapter 32 Solutions
Conceptual Physics: The High School Physics Program
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