Two charged capacitors have their outer plates fixed and inner plates connected by a spring of force constant k . The magnitude of charge on each capacitor is q and sign of charge is shown in figure. Find the extension in the spring at equilibrium.

Question

Two charged capacitors have their outer plates fixed and inner plates connected by a spring of force constant k . The magnitude of charge on each capacitor is q and sign of charge is shown in figure. Find the extension in the spring at equilibrium., q 2 2 A ε 0 k, q 2 4 A ε 0 k, q 2 A ε 0 k, zero

MARKS App · Accepted Answer

We know that spring force F = k x will balance electrostatic force of attraction. Therefore, q 2 2 A ε 0 = k x ⇒ x = q 2 2 A ε 0 k

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