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College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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Question
Consider a parallel-plate capacitor constructed from two circular metal plates of radius R. The plates are
separated by a distance of 1.5 mm. (a) What radius must the plates
have if the capacitance of this capacitor is to be 1.0 mF? (b) If the
separation between the plates is increased, should the radius of
the plates be increased or decreased to maintain a capacitance of
1.0 mF? Explain. (c) Find the radius of the plates that gives a capacitance of 1.0 mF for a plate separation of 3.0 mm
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- A parallel-plate capacitor has circular plates of 6.21 cm radius and 1.18 mm separation. (a) Calculate the capacitance. (b) What charge will appear on the plates if a potential difference of 164 V is applied?arrow_forwardMY YSY When an air-filled parallel-plate capacitor is connected to a 28 V battery, it contains 80 µC of charge. After disconnecting the capacitor from the battery, the distance between two parallel plates is now reduced to half. (a) What is its new capacitance? Cnew µF %3D (b) What is the new potential difference between two plates? Vnew volts (c) Find the energy stored in the new capacitor. Unew %3Darrow_forwardA certain capacitor has a capacitance of 4μF when its plates are separated by 0.2 mm of vacant space. A battery is used to charge the plate to a potential difference of 500 V and is then disconnected from the system. (a) What will be the potential difference across the plates if a sheet of mica 0.2 mm thick is inserted between the plates? (b) What will the capacitance be after the dielectric is inserted? (c) What is the permittivity of mica?arrow_forward
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