Asked by JASKAMAL KAUR | 4th Jun, 2015, 06:13: PM

Expert Answer:

begin mathsize 14px style Let space straight C subscript 0 space be space the space initial space capacitance space and space straight V space be space the space potential space difference colon When space a space dielectric space slab space is space placed space between space the space plates space of space straight a space charged space capacitor space disconnected space from space the space source colon 1. space Charge space on space the space plates space remains space same On space disconnecting space the space battery comma space the space charge space on space the space capacitor space will space remain space unchanged space and space will space be colon Initial space charge comma straight q subscript 0 space equals straight C subscript 0 straight V space We space know space that space Capacitance comma straight C subscript 0 space equals fraction numerator straight epsilon subscript 0 straight A over denominator straight d end fraction straight q subscript 0 space equals fraction numerator straight epsilon subscript 0 straight A over denominator straight d end fraction straight V space equals straight q  2. Electric space field space intensity space decreases Electric space field space straight E space initially space will space be colon space straight E subscript 0 equals straight sigma over straight epsilon subscript 0 equals straight q subscript 0 over Aε subscript 0 equals straight q over Aε subscript 0 After space introducing space the space dielectric comma space the space permitivity space of space medium space becomes space Kε subscript 0 So space Electric space field space between space the space plates comma straight E equals fraction numerator straight q over denominator straight A space Kε subscript 0 end fraction equals straight E subscript 0 over straight K This space shows space that space electric space field space decreases space. It space reduces space to space 1 over straight K times. 3. Capacitance space of space the space capacitor space increases. The space capacitance space straight C space will space be space straight C equals KC subscript 0 This space shows space that space the space capacitance space straight C space increases. end style

Answered by Jyothi Nair | 5th Jun, 2015, 09:12: AM

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