Find the relative permittivity ɛr of the dielectric material present in a parallel-plate capacitor if: A = 0.12 m2, d = 80 µm, V =12 V, U =1 µJ
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Find the relative permittivity ɛr of the dielectric material present in a parallel-plate capacitor if: A = 0.12 m2, d = 80 µm, V =12 V, U =1 µJ
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- 1. Calculate the equivalent capacitance between A and B a) C/2 b) C d) 3C/2 e) 6C 2. Calculate the equivalent resistance between Aand a) C/2 b) C 4C/3 ) 30/2 3 Oloulate the equivaleot capacitance between A and B b) C 0 ac/2A parallel plate capacitor has plates of area 2.56 cm2 spaced by three layers of different dielectric materials. The relative permittivities are 2, 4, 6 and thickness of 0.5, 1.5 and 0.3 mm respectively. Draw the diagram a. calculate the capacitance of this capacitor b. solve for the total charge if the voltage is 50 VSuppose the space between the plates of the capacitor is filled with equal thickness of the same dielectrics but arranged as shown in the figure. Eachhaving an area of 8.0x10 -4 m 2 and separated from each otherby 5.0 mm. Half of the space between the plates is filled withglass and the other with mica. What is its capacitance?
- 1. a) Calculate the capacitance in Pico farad of a parallel-plate capacitor having plates 10 cm by 30 cm separated by 0.01 mm and the dielectric has relative permittivity of 15. (2 Marks) b) For the circuit shown in Figure 1, determine: i. The total capacitance of the circuit ii. The total energy stored in the circuit iii. The charges in the capacitors shown as C1 and C2. (3 Marks) 2µF 2 µF 2µF 2 µF 2 µF 2 µF C2 2µF 2 µF 50V Figure 1 ToA paralel-plate capacitor is constructed using a dielectric material whose dielectric constant is 2.40 and whose dielectric strength is 3.00 x 10" wm. The desired capacitance is 0.100 g, and the capacitor must withstand a maximum potential difference of 4.00 kv. Find the minimum area of the capacitor plates. Jm²Question 20 Consider a parallel connection of two capacitors. They were detached from the potential source after being charged, and dielectrics were placed into both of them. Which of the following events occurs? O Across each capacitor, the potential changes but the charge does not. O Across each capacitor, the potential changes but the charge does not change. O The potential and the charge across each capacitor does not change. O The potential and the charge across each capacitor changes. O none among the choices
- Which of the statements below are correct I. Capacitors use electric field to store current. II. Inductance is increased with permeability of the core material. III. Capacitance of a capacitor decreases with the increasing permittivity of the dielectric. IV. Current of an inductor can not change abruptly. a. Il and IV b. I and || C. None d. III and IV e. Il and IIA certain parallel-plate capacitor consists of two plates, each with area 200 cm2, separated by a 0.4 cm air gap. If the capacitor is connected across a 400-V source. Draw the diagram a. Determine the energy stored on it. b. Determine the energy stored if there is a dielectric material with constant of 2.5 inserted between the plates.1) First part of the question: Two identical capacitors are connected in parallel and charged with a 20-V power supply as shown in the figure on the left. After the charges on the capacitors have reached their final values, the charge on each capacitor is 10 µC. Then the power supply is disconnected and a dielectric with K = 4 is inserted to fill the space between the plates of one of the capacitors. a) Find now the charge on the capacitor with dielectric. Give your answer in microcoulombs. Qo = 10 µC Qo = 10 µC| Q2 =? ► V = 20 V Battery