Questions
An uncharged parallel plate capacitor having a dielectric of dielectric constant K is connected to a similar air cored parallel plate capacitor charged to a potential V0. The two share the charge, and the common potential becomes V. The dielectric constant K is
detailed solution
Correct option is A
C1=C, V1=V0, C2=KC, V2=0, and Vcommon =VWe know thatVcommon =C1V1+C2V2C1+C2∴V=CV0+KC×OC+KCor K=V0V−1Talk to our academic expert!
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Two metallic charged spheres whose radii are 20 cm and 10 cm respectively, have each 150 micro-coulomb positive charge. The common potential after they are connected by a conducting wire is
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