a) What is the magnitude of the electric force between the electron and proton b) In the simple model of the atom, known as the Bohr model, the electron orbits the proton in a circle of radius 0.529 nm. How fast is it moving?
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a) What is the magnitude of the electric force between the electron and proton
b) In the simple model of the atom, known as the Bohr model, the electron orbits the proton in a circle of radius 0.529 nm. How fast is it moving?
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- 3)An electron with speed 2.15×107 m/s is traveling parallel to a uniform electric field of magnitude 1.15×104 N/C . Part A How far will the electron travel before it stops? Part B How much time will elapse before it returns to its starting point?In the proton in a hydrogen atom, an electron is orbiting the proton at a radius of 0.5 × 10-10m. The proton has a charge of 1.6 × 10-19C, equal and opposite to that of the electron. a. Draw a diagram to describe the situation. b. Find the electric potential energy between the proton in a hydrogen atom and an electron orbiting the proton. c. What does the sign of electric potential energy indicate?a. A charge of Q coulomb is uniformly distributed over a spherical volume of radius R metre. Obtain an expression for the energy of the system. b. What will be the corresponding expression for the energy needed to completely disassemble the planet earth against the gravitational pull amongst its constituent particles? Assume the earth to be a sphere of uniform mass density. Calculate this energy, given the product of the mass and the radius of the earth to be 2.5 × 10³1 kg m. c. If the same charge of Q coulomb as in part (a) above is given to a spherical conductor of the same radius R, what will be the energy of the system?
- Retarding E Field An electron with a speed of v= 6 x 107 m/s enters an electric field of magnitude E = 2 x 10³ N/C, traveling along the field lines in the direction that retards its motion. Emily Smith - PHGN200, Spring 2021 - Intro to E&M Sample Exam I Questions from Fall 2011 How far will the electron travel in the field before stopping momentarily? 6A 35 mg particle travelling straight towards a fixed positive point charge of 4.3X109 C. When it is 9 cm away from the fixed-point charge, it has a velocity of 30 cm/s. During motion, what happen to the acceleration? Oi. Zero acceleration. O i. It is uniformly accelerated. O i. Not constant. O iv. Negative acceleration. v. Constant.4. An electron is in motion at 4.0 × 106 m/s horizontally when it enters a region of space between two parallel plates, as shown, starting at the negative plate. The electron deflects downwards and strikes the bottom plate. The magnitude of the electric field between the plates is 4.0 × 102 N/C and separation between the charged plates is 2.0 cm. d = 2.0 cm a. Referring to the previous image, state the sign of the charge on each electric plate: i. Sign of bottom plate -. ii. Sign of the top plate -. b. Determine the acceleration of the electron between the plates. c. Determine the horizontal distance travelled by the electron when it hits the plate. d. Determine the velocity of the electron as it strikes the plate.
- B53)An electron with speed 2.15×107 m/s is traveling parallel to a uniform electric field of magnitude 1.15×104 N/C . Part A How far will the electron travel before it stops? Part B How much time will elapse before it returns to its starting point?After a glass rod is rubbed with silk, it is observed to have a net charge of +24 nC. Which of the following statements correctly describes the interaction between the silk and the rod? A. The rod transferred 1.5 x1011 electrons to the silk. B. The rod transferred 1.5 x1011 protons to the silk. C. The silk transferred 1.5 x1011 electrons to the rod. D. The silk transferred 1.5 x1011 protons to the rod.
- 3. Each small sphere shown has a charge of magnitude q but the stationary charge in the center is negative while the two moving charges are positive. The moving charges (each of mass 0.20 kg) are attached to the ends of 4.0 m long strings and they are moving like conical pendulums as shown at a constant velocity of 12.0 m/s in uniform circular motion. The strings each make an angle of 30° to the vertical. Find the magnitude of the charge q. 300: 30° 4.0 m 4.0 m + q - 9 +qB1Which of the following statements is false for a conductor in electrostatic equilibrium. a. The charge on the conductor is always distributed uniformly throughout the conducting material b. The electric potential inside the conductor is constant. c. The electric field at the surface of the conductor is perpendicular to the surface everywhere. d. The electric field inside the conducting material is zero. e. Any excess charge resides solely on the surface of the conductor.