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- A parallel-plate capacitor using a dielectric material having an Pr of 2.2 has a plate spacing of 2 mm (0.08 in.). If another material having a dielectric constant of 3.7 is used and the capacitance is to be unchanged, what must the new spacing be between the plates?Calculate the capacitance between a 50V conducting wire and its image if the wire has a diameter of 10cm and the distance between the wire to a nearby conducting plane is 3cm in free space. *Two coaxial conducting cylinders are located at ρ = 2 cm and ρ = 4 cm in free space and have a length of 100 m. The region between the cylinders contains a layer of dielectric from ρ = 2 cm to ρ = 3.69 cm with εr = 2. The capacitance in nF is?
- How much charge can be placed on a capacitor of plate area 10 cm^2 with air between the plates before it reaches atmospheric breakdown where E = 3 × 10^6 V/m?When an ac potential of 1000 V is applied at a frequency of 1 MHz, a parallel-plate capacitor with dimensions of 38 mm by 65 mm and a plate spacing of 1.3 mm must have a minimum capacitance of 70 pF. Which of the materials listed in Table 2 might be a good fit? Why?calculate the capacitance for a spherical capacitor composed of an internal conductor of radius ra and an external conductor of radius rb and containing a dielectric of permittivity E
- A parallel plate capacitor contains two dielectrics A and B (interfaces parallel to E and D) with relative permittivity of 1.5 and 3.5 respectively. Dielectric B comprises one third of the capacitor's volume and the remaining volume is occupied by dielectric A. If the area of each conducting plate is 3 square meters and the separation between them is 2 mm, find the capacitanceA spherical capacitor having a radius of 5cm and 5.5cm for positive and negative conductor respectively. If the charges on each conductor are 9nC, what is the capacitance value of this capacitor?A parallel plate capacitor consists of two metal sheets of copper foil, each of area 1 m, separated by a 10.0 mm thick sheet of plastic having a relative permittivity of 2.25. What is the capacitance? (b) Calculate the capacitance per meter of length of air filled coaxial line with an inner conductor of 4 mm diameter and an outer conductor of inside diameter of 6 mm.
- Between the plates of a capacitor with an area of A = 40 cm², and distance between the plates of d = 30 cm, three dielectric materials are placed, as shown in the following figure. what is the equivalent capacitance of the capacitor with the three dielectric materials with permittivities ε1= 0.20 F / m, ε2=0.30 F / m, ε3= 0.40 F / m ?Determine the value of the capacitance, in picofarads, of a parallel-plate capacitor using a dielectric of relative permittivity 4.07 with dielectric thickness 33 mm and plate area 46 cm2. Use 8.854 × 10-12 F/m for the permittivity of free space.Determine the Electric Field Intensity at (6, -3, -4) due to: Q_{1} = 20mu*C at (1, -4, 5) and Q_{2} = - 15mu*C at (2, 3, -6)