4. Now, instead of considering the changes in energy of a block, consider the changes in energy of a charge. Imagine that a proton is placed close to a metal plate that is positively charged, as in the figure. To the right of the proton is another metal plate, which is negatively charged. || (a) Will the proton naturally stay where it is after it is placed there? Or will it want to move? Explain. (b) Describe the changes in energy that happen just after the proton is placed at the plate.

4. Now, instead of considering the changes in energy of a block, consider the changes in energy of a charge. Imagine that a proton is placed close to a metal plate that is positively charged, as in the figure. To the right of the proton is another metal plate, which is negatively charged. || (a) Will the proton naturally stay where it is after it is placed there? Or will it want to move? Explain. (b) Describe the changes in energy that happen just after the proton is placed at the plate.

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter18: Electric Charge And Electric Field

Section: Chapter Questions

Problem 53PE: A simple and common technique for accelerating electrons is shown in Figure 18.55, where there is a...

See similar textbooks

Similar questions

A person is placed in a large, hollow, metallic sphere that is insulated from ground, (a) If a large charge is placed on the sphere, will the person be harmed upon touching the inside of the sphere? (b) Explain what will happen if the person also has an initial charge whose sign is opposite that of the charge on the sphere.
(a) Would life be different if the electron were positively charged and the proton were negatively charged? (b) Does the choice of signs have any bearing on physical and chemical interactions? Explain your answers.
Describe one promising explanation for how thunderclouds become electrified, that is, acquire a charge separation that often leads to cloud-to-ground lightning strikes.
(a) What is the electric field 5.00 m from die center of the terminal of a Van de Graaff with a 3.00-mC charge, noting that the field is equivalent to that of a point charge at the center of the terminal? (b) At this distance, what force does the field exert on a 2.00C charge on the Van de Graaff’s belt?
An atomic nucleus contains positively charged protons and uncharged neutrons. Since nuclei do stay together, what must we conclude about the forces these nuclear particles?
A glass rod is initially neutral. After it is rubbed with silk, its charge is 45.7 C. a. Has the rod gained or lost mass? Explain. b. How much mass has the rod gained or lost?
Protons in an atomic nucleus ale typically 1015 m apart. What is the electric fore of repulsion between nuclear protons?
(a) What is the dipole moment of the configuration shown above? If Q=4.0C , (b) what is the torque on this dipole with an electric field of 4.0105N/Ci ? (c) What is the torque on this dipole with an electric field of 4.0105N/Ci ? (d) is the torque on this dipole with an field of 4.0105N/Cj ?
(a) What is the direction of the total Coulomb force on q in Figure 18.46 if q is negative, qa= qcand both are negative, and qb= qcand both are positive? (b) What is the direction of the electric field at the center of the square in this situation?
Suppose a speck of dust in an electrostatic precipitator has l.0000 1012 protons in it and has a net charge of5.00 nC (a very large charge for a small speck). How many electrons does it have?
Review. Two insulating spheres have radii 0.300 cm and 0.500 cm, masses 0.100 kg and 0.700 kg, and uniformly distributed charges 2.00 C and 3.00 C. They are released from rest when their centers are separated by 1.00 m. (a) How fast will each be moving when they collide? (b) What If? It the spheres were conductors, would the speeds be greater or less than those calculated in part (a)? Explain.
Suppose Earth and the Moon each carried a net negative charge Q . Approximate both bodies as point masses and point charges. (a) What value of Q is required to balance the gravitational attraction between Earth and the Moon? (b) Does the distance between Earth and the Moon affect your answer? Explain. (c) How many electrons would be needed to produce this charge?