Exercise 1: Dielectric material with constant (k = 7) is inserted between two plates of a capacitor. If the area of each plate is 0.75 m2 and the free charge on them 4 x 10-1°C. a- Determine the electric displacement without dielectric. b- Determine the electric displacement with dielectric.

Two 11.0-cm-diameter electrodes 0.75 cm apart form a parallel-plate capacitor. The electrodes are attached by metal wires to the terminals of a 14 V battery. Part A What is the charge on each electrode while the capacitor is attached to the battery? Enter your answers separated by a comma. Express each answer using three significant figures. ▸ View Available Hint(s) 195) ΑΣΦΑ Q₁, Q₂ = Submit Part B Submit What is the electric field strength inside the capacitor while the capacitor is attached to the battery? Express your answer using three significant figures.. ▸ View Available Hint(s) 195] ΑΣΦΑ ? ? C V/m

IP A parallel-plate capacitor filled with air has plates of area 6.6x10-3³ m² and a separation of 0.36 mm. Part A Find the magnitude of the charge on each plate when the capacitor is connected to a 12-V battery. Express your answer using two significant figures. Q= Submit Part B Submit O Increase O Decrease O Stay the same 17| ΑΣΦ | Will your answer to part A increase, decrease, or stay the same if the separation between the plates is increased? Part D Request Answer Part C Complete previous part(s) Q = Submit Request Answer www. ? Calculate the magnitude of the charge on the plates if the separation is 0.83 mm. Express your answer using two significant figures. IV—| ΑΣΦ 3 Request Answer nC ? nC

Part A How strong is the electric field between the plates of a 0.89 µF air-gap capacitor if they are 2.3 mm apart and each has a charge of 67 µC ? Express your answer using two significant figures. Hνα ΑΣφ ? E = V/m Submit Request Answer

A uniform electric field of magnitude 7.8x105 N/C points in the positive z direction. Part A Find the change in electric potential energy of a 8.0-μC charge as it moves from the origin to the point (0, 6.0 m). Express your answer using one significant figure. IVE] ΑΣΦ AU = Submit Part B AU = Find the change in electric potential energy of a 8.0-μC charge as it moves from the origin to the point (6.0 m, 0). Express your answer using two significant figures. IVE] ΑΣΦ Submit Part C Request Answer AU = Submit Request Answer w ? Find the change in electric potential energy of a 8.0-μC charge as it moves from the origin to the point (6.0 m, 6.0 m). Express your answer using two significant figures. [5] ΑΣΦ Request Answer ? w ? J J J

(a) After J. J. Thompson experimentally discovered the existence of electrons in 1897, he went on to propose the plum pudding model of matter. What was the plum pudding model? What did Ernest Rutherford conclude about the structure of matter based on his experimental results from bombarding gold foil with alpha particles? (b) What was the proposed atomic model of matter put forward by Rutherford? Theoretically what was the problem with his proposed model of the atom? (c) What was the modification made by Niels Bohr to Rutherford's model, i.e., what were the assumptions that Bohr made for his version of the atomic model of matter? (d) What observational phenomena was Bohr's proposed model able to explain? How did his model explain these phenomena? (e) Draw an energy level diagram with one representative transition to support your answer to part (d).

A 5.60 μF parallel-plate air capacitor has a plate separation of 4.50 mm and is charged to a potential difference of 300 V. Part A Calculate the energy density in the region between the plates, in units of J/m³. Express your answer in joules per cubic meter. VE ΑΣΦ U = Submit Previous Answers Request Answer ? X Incorrect; Try Again; 2 attempts remaining J/m³

Part A The work done by an external force to move a -5.60 µC charge from point A to point B is 1.50x10-3 J. If the charge was started from rest and had 4.72x10-4 J of kinetic energy when it reached point B, what must be the potential difference between A and B? Express your answer with the appropriate units. HẢ ? VB – VA = Value Units

Part A An isolated 4.40 µF parallel-plate capacitor has 4.20 mC of charge. An external force changes the distance between the electrodes until the How much work is done by the external force? capacitance is 2.40 µF. Express your answer with the appropriate units. HA W = Value J %D Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining Return to Assignment Provide Feedback