Question based on a textbook side note
What happens if the sign of one charge is reversed while magnitudes and distance stay fixed?
مقداریں اور فاصلہ مستقل رکھ کر ایک چارج کا نشان الٹیں تو کیا ہوگا؟
Solution & explanation
The force magnitude k abs(q₁q₂)/r² stays the same, but attraction changes to repulsion or vice versa. Reversing both signs leaves the product sign unchanged, so the interaction type stays the same. These are different operations.
Independent study material · English-medium textbook p. 96 · Original book ↗