(a) What is capacitance? You are given a parallel-plate capacitor with vacuum betweenthem, now if you replace the vacuum (K=1) by other dielectric material with K value ismore than one, then how will the capacitance change? explain on the basis ofpolarization.(b) In Fig. 1, two parallel-plate capacitors (with air between theplates) are connected to a battery. Capacitor 1 has a plate areaof 1.5 cm? and an electric field (between its plates) ofmagnitude 2000 V/m. Capacitor 2 has a plate area of 0.70 cm?and an electric field of magnitude 1500 V/m. What is the totalC2Figure 1charge on the two capacitors?

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Answered: (a) What is capacitance? You are given…

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Kto A In the formula for capacitance C-- variable d represents: Select one: O separation between the plates of the capacitor O area of the metal plates that make up the capacitor for this experiment. O is the permittivity constant. O is the dielectric constant of the insulating material between the plates. When two capacitor plates are connected to a potential difference V, Select one: O None of the above One of the plates is charged with charge Q and the other plate is neutral. O The two plates are charged with equal but opposite amount of charge Q O The two plates are charged with equal amount of charge Q
When a battery is connected across an empty capacitor, the charge on its plates is Q0 (fig. a). If a dielectric of dielectric constant ?κ is inserted between the plates while the battery remains in place (fig. b), what is the expression for the induced charge on the dielectric surface in terms of the original plate charge Q0?
Note: The value of a=0, b=5 and C=7.