Discussion #6 Demonstrations in Electricity

There are 2 kinds of electric charge: positive and negative. What are 2 examples of how we make use of charged particles. Explain your example.

Describe your approach to determining the distance between the electron and proton in an atom if the potential energy U of the electron is known to be 14 eV. a. Use Coulomb's law. b. Use the definition of electrostatic potential energy U of one point charge q at position r in the presence of an electric potential. O c. Use Newton's second law. O d. Use the law of conservation of energy.

ELECTROMAGTENICS: Solve the follwoing questions with complete solution. Question 2 What incremental energy (in picojoules) is needed to move a 1 – µC charge an incremental distance of 1 µm in the field E = 12a, – 20 a4 + 10 a, V /m from the point P(8, 30°, 11) toward the point Qa(10, 35°, 8).

if an atom has 19 protons and an overall charge of +1, how many electrons does it have?

Describe your approach to determining the distance between the electron and proton in an atom if the potential energy U of the electron is known to be 14 eV. а. Use Coulomb's law. O b. Use the law of conservation of energy. С. Use Newton's second law. O d. Use the definition of electrostatic potential energy U of one point charge q at position r in the presence of an electric potential.

Describe your approach to determining the distance between the electron and proton in an atom if the potential energy U of the electron is known to be 14 eV. а. Use the law of conservation of energy. b. Use Coulomb's law. С. Use the definition of electrostatic potential energy U of one point charge q at position r in the presence of an electric potential. d. Use Newton's second law.

How triboelectric charging works. Explain.

C8T.4 Ahydrogen atom consists of an electron (with nega- tive charge) orbiting a proton (with positive charge). With the conventional definition of the reference position for electrostatic potential energy, the electrostatic potential energy for this system A. is positive. B. is zero. C. is negative. D. depends on how fast the electron is moving.

1. A simple diagram of the electric field around an alpha particle is shown below. State the feature of the diagram that shows that the electric field gets weaker as the distance from the alpha particle increases. 2. Charges qA and qB are in a vacuum and have a distance of 15 cm between their centres. Charge qc is placed on the line joining qA and qB, at a point where it experiences zero net force. This point is 5.0 cm from charge qA, as shown in the diagram below: 9A 5.0 cm ● 9c 15 cm [This diagram is not drawn to scale.] Using proportionality, calculate the ratio of charge q to charge qA- 9B

In the video, the students discussed with the professor how objects can become charged through contact interactions at the microscopic level. Which of the following could possibly happen when two neutral objects are rubbed together? There may be more than one possibility. (Select all that apply.) A.Friction between the two objects can destroy electrons in them, allowing both to have a net positive charge after contact B.Rubbing imparts energy to the two objects, allowing them to create excess electrons and thereby allowing both to have a net negative charge after contact. C.There might not be any changes to the chemical bonds between atoms, and the two objects remain neutral after contact. D.Chemical bonds can break in such a way that atoms in the objects can gain or lose electrons. One object can gain electrons overall, with the electrons coming from the other object. The two objects thereby end up with opposite net charges.

A5

Please answer the following question(s): 1. Electron Proton Calculate the potential energy of an electron and proton in a hydrogen atom (use J): -19 leV = 1.6 x 10-1 In Joules: J In eV: eV -19 Use that the magnitude charge on an electron and a proton is 1.6X101°C, the atomic radius is 5.3x10 1'm, and k=9 ×10° Nm?/C?. -11

1. Consider four 1 Coulomb charges, arranged in a square, 1m on a side. a) What is the energy of a 1 Coulomb charge in the centre of the square? b) For fun (for some definitions of fun) express this quantity in terms of the energy released by the explosion of a ton of TNT. (What this really tells us is that a Coulomb is large amount of charge.)

ASAP

The distance, r, between the proton and electron in the hydrogen atom is about 10^−10 m.i) Calculate the electrostatic force between the electron and proton.ii) Determine the value of the potential energy U of the electron in the hydrogen atom.Express your result in electron-volts (eV). Recall 1 eV = 1.6 × 10−19 J.iii) Determine the value of the kinetic energy of the electron. Express your result in eV.

Describe your approach to determining the distance between the electron and proton in an atom if the potential energy U of the electron is known to be 14 eV. а. Use Coulomb's law. O b. Use the definition of electrostatic potential energy U of one point charge q at position r in the presence of an electric potential. Ос. Use Newton's second law. O d. Use the law of conservation of energy.

Hair and a balloon are rubbed together. A metal plate is brought close to the balloon, but they do not touch. I (a neutral and conductive human being) poke the metal and then go away. The metal plate is then brought over to a small metal ball hanging from a (insulating) string. After they touch the ball now repels from the plate.   Describe the motion of electrons through the step  by step process. Use correct  terminology if you know it, otherwise be very descriptive or use pictures to demonstrate what the electrons do. Is the small metal ball in the end positively or negatively charged?

Please answer correctly number 22 to 50. Thanks!