Concept explainers
(a)
The magnitude and the direction of the force exerted.
(a)
Explanation of Solution
Given:
Four point charges placed at corners of a square whose edge length is L.
Formula used:
Write the expression for the net force acting on
Here,
Write the expression for the
Here,
Write the expression for the
Here,
The magnitude of charge
Here,
Substitute
Substitute
Substitute
Calculation:
Substitute
Conclusion:
Thus, the magnitude and the direction of the force is
(b)
The magnitude of the electric field.
(b)
Explanation of Solution
Formula used:
Write the expression for the electric field at
Here,
Write the expression for the electric field due to charge
Here,
Write the expression for the electric field due to charge
Here,
Write the expression for the electric field due to charge
Here,
Write the expression for the electric field due to charge
Here,
Substitute
Substitute
Substitute
Substitute
Calculation:
Substitute
Conclusion:
Thus, the magnitude and the direction of the electric field is
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Chapter 21 Solutions
Physics for Scientists and Engineers
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