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Physics - Electrostatics Question with Solution | TestHub

PhysicsElectrostaticsMiscellaneousEasy2 minPYQ_2020

PhysicsEasysingle choice

Two identical capacitors have the same capacitance $C$ . One of them is charged to potential $V_{1}$ and the other to $V_{2}$ . If their like-charged plates are then connected together, then the decrease in energy of the combined system is

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Answer:

Solution:

$Δ U=$ decrease in potential energy

${=U}_{i} - U_{f}$

$= \frac{1}{2} C (V_{1}^{2} + V_{2}^{2}) - \frac{1}{2} (2 C) {(\frac{V_{1} + V_{2}}{2})}^{2} = \frac{1}{4} C {(V_{1} - V_{2})}^{2}$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:ElectrostaticsSubtopic:Miscellaneous

⏱ 2mℹ️ Source: PYQ_2020

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