Question

Point charges \( Q_1 = 1\text{nC} \) and \( Q_2 = 2\text{nC} \) are at a distance apart. Which of the following statement is \textbf{incorrect?

• A. The force on \( Q_1 \) is repulsive
• B. The force on \( Q_2 \) is the same in magnitude on \( Q_1 \)
• C. As the distance between them decreases, the force on \( Q_1 \) increases linearly
• D. The force on \( Q_2 \) is along the line joining them

Hint:

Coulomb’s force varies with the \textbf{inverse square of the distance} between charges.

Answer 1

The Correct Option is C

According to Coulomb’s Law: \[ F = k \frac{Q_1 Q_2}{r^2} \] So — force is inversely proportional to the square of distance, not linearly.