each is 10 V, find the charge on each and the potential difference across the co

Question

each is 10 V, find the charge on each and the potential difference across the combination. Section 19-6 Electrical Energy Storage A 3- mu F capacitor is charged to 100 V. (a) How much energy is stored in the capacitor? (b) How much additional energy required to charge the capacitor from 100 to 200 V? A 10- mu F capacitor is charged to Q = 4 mu C. (a) How much energy is stored? (b) If half the charge is removed, how much energy remains? (a) Find the energy stored in a 35- mu F capacitor charged to Q = 6 mu C. (b) Find the additional energy required to increase the charge from 6 mu C to 12 mu C. A capacitor is charged to 400 V. The charge on the plates is 45 mu C. How much energy is stored? A parallel-plate capacitor is charged to 200 V. The plate separation is 2.5 mm. (a) What is the electric field between the plates? (b) Find the electrostatic energy density in the space between the plates. (c If the plates are squares of side 15 cm, find the total energy stored In the field between the plates. (d) Calculate the capacitance of this capacitor from C = and use your result to calculate the total energy

Explanation / Answer

Quesion No - 38 (a) elctric field E =    potential / d Here distance between the plates   d = 2.5 mm V=   200V E =   200V / (2.5*10^-3 m)   = 8*10^4 V/m (b) electro static energy density u = (1/2)0E^2 Here 0 =8.85*10^-12 C^2 / N.m^2 u   = 0.0283 j (c) Area of the each plate A   = (0.15 m) = 0.0225 m^2 (d) capacitence   C = 0 A / d   =   0.0797 *10^-9 F   (or) 0.0797 nF (e) Energy stored in the capcitor    U = (1/2) CV^2 Here C = 0.0797 nF V =   200V   U =   1.594*10^-6 j

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