Lesson: Capacitance of a Spherical CapacitorPhysics
In this lesson, we will learn how to model the net capacitance produced by a spherical capacitor.
Sample Question Videos
Earth can be considered as a spherical capacitor with two plates, where the negative plate is the surface of Earth and the positive plate is the bottom of the ionosphere, which is located at an altitude of approximately 70 km. The potential difference between Earth’s surface and the ionosphere is about 350,000 V.
Calculate the capacitance of this system.
Find the total charge on this capacitor.
Find the energy stored in this system.
What is the capacitance of a large Van de Graaff generator’s terminal given that it stores 5.00 mC of charge at a voltage of 6.0 MV?
A spherical capacitor is formed from two concentric conducting spheres separated by vacuum. The inner sphere has radius 12.5 cm and the outer sphere has radius 14.8 cm. A potential difference of 120 V is applied to the capacitor.
What is the capacitance of the capacitor?
What is the magnitude of the electrical field at just outside the inner sphere?
What is the magnitude of the electrical field at just inside the outer sphere?