Capacitors Questions and Answers

A 6.30 μF capacitor that is initially uncharged is connected in series with a 4600 2 resistor and a 502 V emf source with negligible internal resistance. A long time after the circuit is completed (after many time constants), what are the voltage drop across the capacitor and across the resistor? A long time after the circuit is completed (after many time constants), what is the charge on the capacitor?
Physics
Capacitors
A 6.30 μF capacitor that is initially uncharged is connected in series with a 4600 2 resistor and a 502 V emf source with negligible internal resistance. A long time after the circuit is completed (after many time constants), what are the voltage drop across the capacitor and across the resistor? A long time after the circuit is completed (after many time constants), what is the charge on the capacitor?
A capacitor is connected to a power supply with a voltage of 25.0 V across the plates of the capacitor. When it is fully charged, the amount of charge on the plates is 6.25 mC. What is the capacitance of the capacitor? Select one: a. 0.500 mF b. 0.250 mF c. 6.500 mF d. 156. mF
Physics
Capacitors
A capacitor is connected to a power supply with a voltage of 25.0 V across the plates of the capacitor. When it is fully charged, the amount of charge on the plates is 6.25 mC. What is the capacitance of the capacitor? Select one: a. 0.500 mF b. 0.250 mF c. 6.500 mF d. 156. mF
The electrostatic energy of a flat capacitor with discoidal plates having a radius of 2 cm, spaced 0.1 mm apart, and charged with 1 nC, is equal to 4.5 x 10^-9 J nessuno dei valori proposti è corretto. 9 × 10^-11 J 9 x 10-^-9 J
Physics
Capacitors
The electrostatic energy of a flat capacitor with discoidal plates having a radius of 2 cm, spaced 0.1 mm apart, and charged with 1 nC, is equal to 4.5 x 10^-9 J nessuno dei valori proposti è corretto. 9 × 10^-11 J 9 x 10-^-9 J
Cell membranes (the walled enclosure around a cell) are typically about d= 7.7 nm thick. They are partially permeable to allow charged material to pass in and out, as needed. Equal but opposite charge densities build up on the inside and outside faces of such a membrane, and these charges prevent additional charges from passing through the cell wall. We can model a cell membrane as a parallel-plate capacitor, with the membrane itself containing proteins embedded in an organic material to give the membrane a dielectric constant of about 12. What is the capacitance per square centimeter of such a cell wall? Express your answer in microfarads per squared centimeter. In its normal resting state, a cell has a potential difference of 85 mV across its membrane. What is the electric field inside this membrane?
Physics
Capacitors
Cell membranes (the walled enclosure around a cell) are typically about d= 7.7 nm thick. They are partially permeable to allow charged material to pass in and out, as needed. Equal but opposite charge densities build up on the inside and outside faces of such a membrane, and these charges prevent additional charges from passing through the cell wall. We can model a cell membrane as a parallel-plate capacitor, with the membrane itself containing proteins embedded in an organic material to give the membrane a dielectric constant of about 12. What is the capacitance per square centimeter of such a cell wall? Express your answer in microfarads per squared centimeter. In its normal resting state, a cell has a potential difference of 85 mV across its membrane. What is the electric field inside this membrane?
A capacitor consists of two 5.0-cm-diameter circular plates separated by 1.0 mm. The plates are charged to 160 V, then the battery is removed. (0 = 8.85 × 10^-12 C²/N-m²) Part A How much energy is stored in the capacitor? (Express your answer in joules to two significant figures.) Part B How much work must be done to pull the plates apart to where the distance between them is 2.0 mm? (Express your answer in joules to two significant figures.)
Physics
Capacitors
A capacitor consists of two 5.0-cm-diameter circular plates separated by 1.0 mm. The plates are charged to 160 V, then the battery is removed. (0 = 8.85 × 10^-12 C²/N-m²) Part A How much energy is stored in the capacitor? (Express your answer in joules to two significant figures.) Part B How much work must be done to pull the plates apart to where the distance between them is 2.0 mm? (Express your answer in joules to two significant figures.)
< Previous1...272829