Question

At the corners of an equilateral triangle of side a = 1m, three point charges each of 0.1C are placed. If the system is supplied energy at the rate of 1kW, calculate the time required to move one of the mid-point of the line joining the other two.

• A. \(50\,\text{h}\)
• B. \(60\,\text{h}\)
• C. \(48\,\text{h}\)
• D. 54h

Hint:

Energy–power relation: Time = fracEnergyPower

Answer 1

The Correct Option is C

Step 1: Calculate initial electrostatic potential energy of the system.
Step 2: Find change in potential energy when charge is moved to the midpoint.
Step 3: Time required: t = (Δ U)/(P) Substituting values gives: t = 48h