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1.2. A capacitor consists of two circular plates of radius r separated by distance d. The plates are charged to voltage V, then the battery is removed. (a) What is the energy density inside the capacitor? (b) If an electron (charge -e, mass m) enters the capacitor with its velocity v perpendicular to the electric field, what magnetic field must be applied so that electron's velocity remains constant? (c) How much work must be done to pull the plates apart to where the distance between them is 3d? (d) If an electron (charge -e, mass m) is released from rest inside the capacitor near its negative plate, what is the electron's momentum when it reaches positive plate?

1.2. A capacitor consists of two circular plates of radius r separated by distance d. The plates are charged to voltage V, then the battery is removed. (a) What is the energy density inside the capacitor? (b) If an electron (charge -e, mass m) enters the capacitor with its velocity v perpendicular to the electric field, what magnetic field must be applied so that electron's velocity remains constant? (c) How much work must be done to pull the plates apart to where the distance between them is 3d? (d) If an electron (charge -e, mass m) is released from rest inside the capacitor near its negative plate, what is the electron's momentum when it reaches positive plate?

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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1.2. A capacitor consists of two circular plates of radius r separated by distance d. The plates are charged to voltage V, then the battery is removed. (a) What is the energy density inside the capacitor? (b) If an electron (charge –e, mass m) enters the capacitor with its velocity v perpendicular to the electric field, what magnetic field must be applied so that electron's velocity remains constant? (c) How much work must be done to pull the plates apart to where the distance between them is 3d? (d) If an electron (charge -e, mass m) is released from rest inside the capacitor near its negative plate, what is the electron's momentum when it reaches positive plate?
Transcribed Image Text:1.2. A capacitor consists of two circular plates of radius r separated by distance d. The plates are charged to voltage V, then the battery is removed. (a) What is the energy density inside the capacitor? (b) If an electron (charge –e, mass m) enters the capacitor with its velocity v perpendicular to the electric field, what magnetic field must be applied so that electron's velocity remains constant? (c) How much work must be done to pull the plates apart to where the distance between them is 3d? (d) If an electron (charge -e, mass m) is released from rest inside the capacitor near its negative plate, what is the electron's momentum when it reaches positive plate?
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