a)
b) The capacitance is charged to a charge then disconnected from battery.
1) Charge: As the distance between the plates is increased, charge on the plates stays the same.
2) Charge density: Charge density is charge per unit area. Area of the plates remains the same and charge remains the same, so charge density also stay the same.
3) Electric field: Electric field of a parallel plate capacitor depends on charge density , so electric field also stay the same.
4)Voltage: Voltage is work done on a unit positive charge in moving it from positive plate to negative plate. As the plate seperation increases, work done also increases. So voltage between the plates also increases .
5)Stored energy: Work done in moving the capacitor plates against the electrostatic attraction is stored as energy in the capacitor. As the distance between the plates increases, potential between the plates increses and so the stored energy also increases.
6) Capacitance: As the charge remains the same and potential between the plates increases, the capcitance of the parallel plates decreases.
Problem 2. Stored energy on a capocitor Two parallel plates are charged up by a battery...
A parallel-plate capacitors is disconnected from a battery, and the plates are pulled a small distance farther apart. Do the following quantities increase decrease, or stay the same? (a) Capacitance (b) Charge (c) Electric Field between the plates (d) Potential difference between the plates (e) Energy stored in the capacitor
2.(A) A capacitor consisting of two parallel plates with direct between them is connected to a battery. As a result, the plates become charged. The battery is then disconnected with the lates insulated so no charge can escape, and the dielectric is then removed. How would each of the following change? The charge on the plates. Increase / Decrease / Remains the same The potential drop across the plates. Increase / Decrease / Remains the same The capacitance of the...
10. A parallel plate capacitor is charged up by a battery. The battery is then disconnected and the capacitor is kept isolated. The plates are then pulled apart. Which one of the following statements is correct? a) The potential difference between the plates remains the same. b) The charge in the capacitor increases. c) The capacitance increases. d) The charge in the capacitor dereases. e) The capacitance decreases.
Two parallel plates are charged with a battery. The battery has a voltage of 12 volts and produces a charge of 23 uC as shown in the figure below. (A) On the figure, draw in the direction of the electric field between the plates and indicate which plate is at higher potential (B) What is the capacitance of the capacitor? (C) If the plates are circular with a radius of 2.2 cm. what is the distance between the plates? (D)...
A dielectric material is inserted between the charged plates of a parallel-plate capacitor. Do the following quantities increase, decrease, or remain the same as equilibrium is reestablished? 1. Charge on plates (plates remain connected to battery) 2. Electric potential energy (plates isolated from battery before inserting dielectric) 3.Capacitance (plates isolated from battery before inserting dielectric) 4. Voltage between plates (plates remain connected to battery) 5. Charge on plates (plates isolated from battery before inserting dielectric) 6. Capacitance (plates remain connected...
A parallel plate capacitor with capacitance C0 is connected to a battery with voltage V0 and is charged fully to a charge Q0. There is an electric field E0 between the plates and energy U0 stored in the capacitor. With the battery still connected, the area of the plates are doubles and the plates are pulled to a distance three times its original distance (while still being small compared to the size of the plates). Find (in terms of the...
Two rectangular parallel plates have area A and are separated by a distance d. They are connected to a power supply and charged with a voltage V. There no insulating material between them. In this configuration the plates make a capacitor with capacitance C. The electric field between the plates is E and the energy stored is U While still connected to the power supply, the plates are moved so the distance between them is one-half what it was. By...
A parallel plate capacitor is comprised of two metal plates with area A and separated by distance d. This parallel plate capacitor is connected to a battery with voltage AVo. Your answer should depend on A, d, ΔVo, and any other physical constants a. Determine the charge stored on the plates of the capacitor and the energy stored in the capacitor b. Determine the strength of the electric field between the plates of the capacitor c. An experimenter has five...
QUESTION 5 A capacitor is fully charged by a battery. When the capacitor is still connected to the battery, the distance between the two plates decreases. Which of the followings will remain the same? Select all that apply. (a) voltage across the capacitor (b) capacitance (c) charge stored in the capacitor (d) electric field between the two plates (e) electric potential energy stored in the capacitor QUESTION 6 A capacitor is fully charged by a battery. When the capacitor is...
2) A 9 volt battery is connected to a parallel plate capacitor with an initial capacitance of 5 micro-farads without a dielectric. While still connected to the battery, the sheets are moved a factor of 6 times further apart and a dielectric with a dielectric constant of 1.8 is inserted between the sheets. Then, the battery is disconnected, and after the battery is disconnected, the dielectric is removed and the sheets are brought a factor of 4 times closer together....