The energy density inside a capacitor is: O depends on the electric field inside the capacitor; the capacitance of the capacitor; The answer can be found on more than one of the choices. O the dimensions of the capacitor;
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- A capacitor (C=540 microF) has a potential deltaV= 80 volts across it. How much energy is stored in the capacitor?You have two parallel plate capacitors, C 1a = 10 nF and C 2a = 20 nF, each with the same area of 2 m^2 that is filled with a dielectric material that is 1 mm thick. a) If the capacitors are connected in series vs parallel, which provides more total capacitance? b) What is the difference in total energy if the capacitors are connected in series vs. parallel? c) What dielectric material would you use in order to make the total capacitance of the capacitors connected in series equal to if they were connected in parallel? Help...Consider a natural parallel plate capacitor where one plate is given by some clouds in the sky and and the other plate is the surface of the earth directly under the cloud. We have a situation where the clouds are 740m above the ground.a) If we consider a cloud area of 1.2km2 what is the capacitance of this capacitor? b) Suppose that the capacitor discharges when the electric field is larger than 5.7 × 105 N/C (lightning!). What is themaximum charge the cloud can hold?(E0 = 8.85 × 10−12 C2/Nm2)
- b. Capacitor A and Capacitor B are two parallel plate capacitors. Capacitor B has twice the area and four times distance between plates of Capacitor A. (i) What is the ratio CB: CA, and (ii) What is the ratio of Energy stored UB:UA when the capacitors store the same charge on its plates?A capacitor can be made of two flat parallel conducting plates of the same area, and opposite polarities. A finite separation between the plates creates a potential difference between them. The capacitance of such a capacitor would vary ----- directly with the area, inversely with the separation O inversely with the area and the separation O directly with the separation, inversely with the area O none of the given choices O directly with the area and the separation2) The capacitances are C₁ = 1.0 mF and C₂ = 3.0 mF, and both capacitors are charged to a potential difference of V = 100 V but with opposite polarity as shown. Switches S₁ and S₂ are now closed. a) What is now the potential difference between points a and b? b) What now is the charge on each capacitor? G a Sq
- Three capacitors are arranged as shown, if C₁ is a parallel plate capacitor d = 2 mm and cross-sectional area is 2 cm2, C₂ is a concentric spherical capacitor with R₁ = 1 mm and R₂ = 2 mm, and C₂ is a concentric cylindrical capacitor with R₁ = 1 mm , R₂ = 2 mm and length L=2 cm, determine: a. C₁, C₂, C3, and Cequivalent b. VAB, VBC C. Q₁, Q2, Qtotal. d. The energy of the capacitorA leaky capacitor loses 5% of its charge in 5 min. What is the effective time constant of the system? The time constant, τ = Units . What fraction of charge (in %) will be on the capacitor after 10 min? The charge, QQ0×100%QQ0×100% = Units . After what time there will be 4% of the initial charge left on the capacitor? The time, t = Units .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