A parallel plate condenser with a dielectric of dielectric constant K between the plates has a capacity C and is charged to a potential V volts. The d - Physics MCQ AIEEE 2007 2026 | ExamTest.live

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A parallel plate condenser with a dielectric of dielectric constant K between the plates has a capacity C and is charged to a potential V volts. The dielectric slab is slowly removed from between the plates and then reinserted. The net work done by the system in this process is:

Solution & Step-by-step Explanation

Work done by a system is given by the negative change in potential energy: W = - Δ U = - (U_{f ina l} - U_{ini t ia l}) .In this process, the final state of the capacitor (with the dielectric slab reinserted) is identical to the initial state.Therefore, U_{f ina l} = U_{ini t ia l}, which means Δ U = 0 .The net work done by the system is zero.

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A parallel plate condenser with a dielectric of dielectric constant K between the plates has a capacity C and is charged to a potential V volts. The dielectric slab is slowly removed from between the plates and then reinserted. The net work done by the system in this process is:

\frac{1}{2} (K - 1) C V^{2}

C V^{2} (K - 1) / K

(K - 1) C V^{2}

zero

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