A 5.00 pF, parallel-plate, air-filled capacitor with circular plates is to be used in a circuit in which it will be subjected to potentials of up to 1.00 × 10² V The electric field between the plates is to be no greater than 1.00 × 10 N/C . As a budding electrical engineer for Live-Wire Electronics, your task is to design the capacitor by finding what its physical dimensions and separation must be. Part A What must the separation between the plates in the designed capacitor be? Express your answer with the appropriate units. d = Submit Part B 123+ Part C Value Submit 123+ R = Value Q = What must the radius of each plate in the designed capacitor be? Express your answer with the appropriate units. 123+ (→ (3) Request Answer Submit Units Value Find the maximum charge these plates can hold. Express your answer with the appropriate units. 3 19 ( 3 ? Units Request Answer ? 5 →→ ( Units Request Answer 3 ?

A 5.00 pF, parallel-plate, air-filled capacitor with circular plates is to be used in a circuit in which it will be subjected to potentials of up to 1.00 × 10² V The electric field between the plates is to be no greater than 1.00 × 10 N/C . As a budding electrical engineer for Live-Wire Electronics, your task is to design the capacitor by finding what its physical dimensions and separation must be. Part A What must the separation between the plates in the designed capacitor be? Express your answer with the appropriate units. d = Submit Part B 123+ Part C Value Submit 123+ R = Value Q = What must the radius of each plate in the designed capacitor be? Express your answer with the appropriate units. 123+ (→ (3) Request Answer Submit Units Value Find the maximum charge these plates can hold. Express your answer with the appropriate units. 3 19 ( 3 ? Units Request Answer ? 5 →→ ( Units Request Answer 3 ?

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter20: Electric Potential And Capacitance

Section: Chapter Questions

Problem 38P: A variable air capacitor used in a radio tuning circuit is made of N semicircular plates, each of...

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A spherical capacitor is formed from two concentric spherical conducting spheres separated by vacuum. Tire 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, (a) What is the capacitance of the capacitor? tb) What is the magnitude of the electrical field at r = 12.6 cm, just outside the inner sphere? (c) What is the magnitude of the electrical field at r = 14.7 cm, just inside the outer sphere? (d) For a parallel-plate capacitor the electrical field is uniform in the region between the plates, except near the edges of the plates. Is this also true for a spherical capacitor?
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A variable air capacitor used in a radio tuning circuit is made of N semicircular plates, each of radius R and positioned a distance d from its neighbors, to which it is electrically connected. As shown in Figure P20.38, a second identical set of plates is enmeshed with the first set. Each plate in the second set is halfway between two plates of the first set. The second set can rotate as a unit. Determine the capacitance as a function of the angle of rotation , where = 0 corresponds to the maximum capacitance. Figure P20.38
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