Physics - Capacitor Question with Solution | TestHub

PhysicsCapacitorForce & Energy analysisEasy2 minPYQ_2018

PhysicsEasysingle choice

The electrostatic force between the metal plates of an isolated parallel plate capacitor $C$ having a charge $Q$ and area $A$ , isNEET 2018

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Answer:

Solution:

For isolated capacitor $Q =$ constant.

Now electric field because of one plate of the capacitor is $E = \frac{σ}{2 \in_{0}} = \frac{Q}{2 A \in_{0}}$ .
$∴$ Force on 1 metal plate is
$F = Q E$
$F = Q \frac{σ}{2 \in_{0}} = \frac{Q^{2}}{2 A \in_{0}}$
$∴$ The electrostatic force is independent of the distance between plates.

Stream:NEETSubject:PhysicsTopic:CapacitorSubtopic:Force & Energy analysis

⏱ 2mℹ️ Source: PYQ_2018

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