Physics Electrostatics SZABMU 2023
PMDC Verified Question 39 of 131
Q.156 The magnitude of the force between two-point charges is directly proportional to:
A
Distance between point charges
B
Square of distance between point charges
C
Cube of distance between point charges
D
Product of magnitude of charges
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: Product of magnitude of charges
1. Concept:

Coulomb's Law splits into two proportionalities: direct proportionality to charge interaction, and inverse proportionality to spatial separation.

2. Formula:

$$ F = k \frac{q_1 q_2}{r^2} $$

3. Solution:

  • The term "directly proportional" refers to the numerator of the equation.


  • The numerator is \( (q_1 \times q_2) \), representing the mathematical product of the separate charge magnitudes.


4. Why other options are incorrect:

Options A, B, and C reference distance. Force is inversely proportional to the square of the distance, not directly.

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