5. An unknown charged particle (an electron or proton) is placed at point A between two parallel plates. The particle is released from rest and accelerates toward the other plate. The particle emerges through the hole at point B with a speed of 1.4 x 105 m/s. The potential difference between the two plates is 100V. 100 V B A a. What is the mass of the charged particle? Is the unknown particle an electron or proton? Justify your answer. b. Which plate (top or bottom) is positively charged?

Two square, conducting plates each contain charge of magnitude Q = 35.4 nC. The plates have side length l = 20 cm and are separated by a distance d = 40 mm. Electrons are fired at speed v throgh a tiny hole in the positive plate toward the negative plate. (Remeber that E = Q/Ep0A for parallel plates) a. what is the potential difference between the plates b. if the electrons are stopped halfway between the plates, what is their initial speed, v? c. what is teh minimum speed the electrons must have if they are to make it all the way to the negative plate?

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A uniform external electric field points to the right. An electron ( me = 9.11E[-31]kg; qe = –1.602 E[–19]C) is place in the field and fired to the right at v¡ 100, 000m/s. a. Draw a picture of the situation b. The electron will eventually come to a stop. What is the change in potential between the electron's starting point and its stopping point? Remember to submit a pdf of your work on this problem to the Moodle assignment listed in the instructions. Also, answer True for this question.

In the image provide these exists two parallel plates call A and B the length of both being 5 centimeters and both separated from each other with a distance of 4 centimeters. An electron enters 1 cm above plate B and it is traveling horizontally at speed of 1x10^6 m/s. VA = 20 V and VB = 10 V are the plate potentials, respectively. A) What is the electrical field (vector) between the plates? B) What is the electric potential V at the entry point of the electron and its initial potential energy? C) The electron eventually find the speed one of the plates, find out out witch one and the speed of the electron before the impact. D) What is the location along the place where the electron makes impact (take x =0 as the left edge of the plates). OFocus 81 F 0.

QUESTION 4 An electron is released from rest at the negative plate of a parallel plate capacitor and accelerates to the positive plate. The plates are separated by a distance of 1.39 cm, and the electric field within the capacitor has a magnitude of 1743307 V/m. What is the kinetic energy of the electron just as it reaches the positive plate? (Give your answer in 2 d.p. with scientific notation(i.e. 1.23e-12)} 1 Electric field Electron F + + + + + + + + + +

3. Determine the motion, qualitatively, of a positive particle given the following lines of constant electric potential. Briefly explain why your reasoning regarding the motion of the particle. + of originally LOULET -V-IV IV/7V -3 OV 3V -15V 15V

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4. A tritium nucleus (1 proton, 2 neutrons) is placed at rest at the location of the positive plate of a capacitor with a potential difference of 950 V. The plates are circular with a diameter of 0.9 cm and a separation of 0.15 cm. a. Sketch the capacitor, label with variables and list known quantities. b. What is the capacitance? c. What is the electric field in the capacitor? d. What is the potential energy of the tritium nucleus when it is placed in the capacitor? e. What is the velocity of the tritium nucleus when it reaches the other plate of the capacitor?

In old TVs, an electron gun accelerates electrons between two parallel plates 1.2cm apart using a 25kV potential difference. a. What is the electric field magnitude between the plates? b. If the electrons start at the negative plate at rest, with what speed will they hot the negative plate? (Note: this speed will be a significant fraction of the speed of light) 3.