Find the capacitance (in pF) of parallel-plate capacitor containing two dielectrics with er1 = 2 and er2 = 3.5, each comprising one-half the volume. The area of the plates is 30 cm2 and the distance between them is 1 cm.
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- Three capacitors having capacitance values of 20F,40F, and 50F are connected in parallel to a 60 - Hz power line. An ammeter indicates a circuit current of 8.6 amperes. How much current is flowing through the 40F capacitor?QUESTION 5 A 20 ohms resistor is connected in series with a capacitor of 0.01 farad and an emf in volts given by 40e-3¹ +20e-6. Assuming that the charge and current on the capacitor are zero at t=0, determine the charge and current at any time.A parallel plate capacitor has its plates separated by 0.5 mm of air. The area plates is 2 m? and they are charged to a p.d.of 100 V.The plates are pulled apart untill they are separated by1 mm of air.Assuming the p.d. to remain unchanged, what is the mechanical force experienced the plates?
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- 2) C. When the capacitor is fully charged, the top conductor while the bottom conductor D. Electric field lines are and a potential difference is E. The capacitance of a capacitor is defined as F. The unit of capacitance isThe network Nc shown below in Figure 1.99(a) contains a combination of scaled capaci- tors in series and parallel connections. Using the vahues as shown, you are asked to do the following. (a) Calculate the value of the terminal capacitance Cab at terminals a-b. (b) To obtain an equivalent capacitance Ceq of 1.5F, Nc is to be placed either in series with a capacitance Cz as shown in Figure 1.99(b) or in parallel with Cx as shown in Figure 1.99(c). Determine which connection is correct and calculate the value of C; that will produce the value of 1.5F for Ceg- 4F 2F 3F 1F C OF (a) N. N. 2. (b) (c) Figure 1.99 (a) Capacitor combo Nc (b) Nc in series with C, (c) Ne in parallel with C,A thin metallic foil is placed between the plates of a flat capacitor parallel to them. How does this affect capacity? What if you join a plate with a wire?