
Concept explainers
To find: the charge on two points

Answer to Problem 18P
The charge
Explanation of Solution
Given:
Total charge
Formula used:
It is given that total charge of two point charges is positive, so both charges must be positive. As electrostatic force between them is repulsive, so both charges must be of same sign. Let
The coulomb's expression for electrostatic force between the charges is given by,
Here,
Calculation:
On re-arrange this equation,
Compare this equation with general quadratic equation,
The roots of this equation,
The values resembles to,
Thus, roots of the quadratic equation:
Conversion of units of charge from micro coulomb's to coulomb's as,
To find the magnitude of the charge, substitute
Corresponding values of another charge is,
Conclusion:
Therefore, charge
Chapter 16 Solutions
Physics: Principles with Applications
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