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 $\left(\mathrm{K}=\frac{1}{4 \pi \varepsilon_0}\right)$
- A$\mathrm{K} \frac{2 \lambda_1 \lambda_2}{\mathrm{R}^2}$
- ✓$\mathrm{K} \frac{2 \lambda_1 \lambda_2}{\mathrm{R}}$
- C$\mathrm{K} \frac{\lambda_1 \lambda_2}{\mathrm{R}^2}$
- D$\mathrm{K} \frac{\lambda_1 \lambda_2}{\mathrm{R}}$
