Name: PHYSICS 1112 Chapter 19- Warm-Up due August 30th Reading Objectives: In PHYS1111 you learned about potential energy (PE = mg h). In section 19.1 you will learn about electric potential energy. Can you find any similitudes? Another important concept you will learn in section 19.1 is electric potential. Wow, these two terms sound pretty similar, but they and electric potential? Equations 19.2 and 19.7 relate these two concepts. are not. What are the units of the potential energy What is an electron-volt? Conservation of energy. Be sure to work out example 19.3 Warm-up 1. Calculate the gravitational potential energy and kinetic energy for each position marked in the figure below. You should have done this in your PHYS1111 class. KE 0 J PE=50 000 J KE= KE= PE= PE= 100 m 60 m KE= PE= 30 m KE= PE= www.physicsclassroom.com Continue on the back

Name: PHYSICS 1112 Chapter 19- Warm-Up due August 30th Reading Objectives: In PHYS1111 you learned about potential energy (PE = mg h). In section 19.1 you will learn about electric potential energy. Can you find any similitudes? Another important concept you will learn in section 19.1 is electric potential. Wow, these two terms sound pretty similar, but they and electric potential? Equations 19.2 and 19.7 relate these two concepts. are not. What are the units of the potential energy What is an electron-volt? Conservation of energy. Be sure to work out example 19.3 Warm-up 1. Calculate the gravitational potential energy and kinetic energy for each position marked in the figure below. You should have done this in your PHYS1111 class. KE 0 J PE=50 000 J KE= KE= PE= PE= 100 m 60 m KE= PE= 30 m KE= PE= www.physicsclassroom.com Continue on the back

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 7CQ

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Similar questions

In Franklins time, a device for storing electric potential energy was called a Leyden jar. Today, we call that device a capacitor. Another term that is sometimes used is condenser. What ideas do these three terms bring to mind? What are the advantages and disadvantages of each?
What is the strength of the electric field in a region where the electric potential is constant?
What does it mean when a force is negative? What does it mean when the potential energy is negative?
If a negatively charged particle is placed at rest in an electric potential field that increases in the positive x-direction, will the panicle (a) accelerate in the positive x-direction, (b) accelerate in the negative x-direction, or (c) remain at rest?
Rank the potential energies of the four systems of particles shown in Figure CQ16.4 from largest to smallest. Include equalities if appropriate. Figure CQ16.4
At a certain distance from a charged particle, the magnitude of the electric field is 500 V/m and the electric potential is 3.00 kV. (a) What is the distance to the particle? (b) What is the magnitude of the charge?
If a proton is released from rest in an electric field, will it move in the direction of increasing or decreasing potential? Also answer this question for an electron and a neutron. Explain why.
A constant electric field accelerates a proton from rest through a distance of 2.00 m to a speed of 1.50 105 m/s. (a) Find the change in the protons kinetic energy. (b) Find the change in the systems electric potential energy. (c) Calculate the magnitude of the electric field.
Rank the electric potential energies of the systems of charges shown in Figure OQ20.13 from largest to smallest. Indicate equalities if appropriate. Figure OQ20.13
What is die strength of the electric field in a region where the electric potential is constant?
A simple and common technique for accelerating electrons is shown in Figure 7.46, where there is a uniform electric field between two plates. Electrons are released, usually from a hot filament, near the negative plate, and there is a small hole in the positive plate that allows the electrons to continue moving, (a) Calculate the acceleration of the electron if the field strength is 2.50104 N/C . (b) Explain why the electron will not be pulled back to the positive plate once it moves through the hole. Figure 7.46 Parallel conducting plates with opposite charges on them create a relatively uniform electric field used to accelerate electrons to the right. Those that go through the hole can be used to make a TV or computer screen glow or to produce X- rays.
A simple and common technique for accelerating electrons is shown in Figure 18.55, where there is a uniform electric field between two plates. Electrons are released, usually from a hot filament, near the negative plate, and there is a small hole in the positive plate that allows the electrons to continue moving. (a) Calculate the acceleration of the electorn if the field strength is 2.50104 N/C. (b) Explain why the electron will not be pulled back to the positive plate once it moves through the hole.