Concept explainers
a. Find the electric field strength at a point 1 m from a charge of 4
b. Find the electric field strength at a point 1 mm [1/1000 the distance of part (a)] from the same charge as part (a) and compare results.
(a)
The electric field strength at a point
Answer to Problem 1P
The electric field strength at a point
Explanation of Solution
Given:
The distance is
The charge is
Concept used:
Expression for the electric filed due to a point charge.
Here,
Calculation:
Substitute
Conclusion:
Thus, the electric field strength at a point
(b)
The electric field strength at a point
Answer to Problem 1P
The electric field strength at point
Explanation of Solution
Given:
The distance is
The charge is
Calculation:
Substitute
Therefore, the electric field strength at a point
Conclusion:
Thus, the electric field strength at point
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