Four equal charges of magnitude q are as shown in fig. Now the charge at center C is taken to infinity slowly, then work done by external force will be -

Question

G1 Physics · Accepted Answer

Step 1: Write electrostatic energy U = Σ kqᵢqⱼ/rᵢⱼ, and use Wext = ΔU for a quasistatic rearrangement. For moving particles, conserve K + U. Step 2: Evaluate initial and final separations/potentials. Step 3: Solve the resulting energy equation for the requested distance, speed or work. Final: Option B. In this specific setup, apply the calculation to: Four equal charges of magnitude q are as shown in fig. Now the charge at center C is taken to infinity sl.