If the distance between two identical charges is doubled, then the force of repulsion betweenthem decreases by
Correct answer: C. one-fourth of the previous value.
- A. two-third of the previous value.
- B. one-third of the previous value.
- C. one-fourth of the previous value.
- D. three-fourth of the previous value.
Explanation
When the distance between two identical charges is doubled, the force of repulsion between them decreases by a factor of 1/2^2 = 1/4. This is because the force between charges is inversely proportional to the square of the distance between them (Coulomb's Law). Option C, one-fourth of the previous value., is the correct answer. The other options provide incorrect fractions as they do not consider the correct mathematical relationship between distance and force in this scenario.
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About Coulomb's Law
Coulomb's law gives the electrostatic force between two point charges in terms of their magnitudes, separation and the medium between them. Questions involve attraction and repulsion, the inverse square relationship, superposition of forces and vector direction, which must not be confused with the electric field produced by a charge.
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