EE 2950 Chapter : Chapter 03
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Because the capacitor voltage is zero at t = 0, the charge on the capacitor is zero at t = 0. tq t. 3 t ms 2 for t ms 4. 40 t ms 2 ms 2 for t ms 4 tvtitp. 10 ms 2 t ms 2 for t ms 4 tw. 2 ms 2 for ) t ms 4 in which the units of charge, electrical potential, power, and energy are coulombs, volts, watts and joules, respectively. Plots of these quantities are shown in figure 3. 8 in the book. Then using equation 3. 8 to substitute for the voltages we have. )0( we can write equation (1) as tv. Thus the three capacitances in series have an equivalent capacitance given by equation 3. 25 in the book. From table 3. 1 we find that the relative dielectric constant of polyester is 3. 4. We solve equation 3. 26 for the area of each sheet:
