MCQ
Two infinitely long parallel wires having linear charge densities $\lambda_1$ and $\lambda_2$ respectively are placed at a distance of $R$ metres. The force per unit length on either wire will be $K=\frac{1}{4 \pi \varepsilon_0}$
- A$K \frac{2 \lambda_1 \lambda_2}{R^2}$
- ✓$K \frac{2 \lambda_1 \lambda_2}{R}$
- C$K \frac{\lambda_1 \lambda_2}{R^2}$
- D$K \frac{\lambda_1 \lambda_2}{R}$
