Question

NOTES: questions are not related to each other

a- An electron is sent at high speed toward a gold nucleus (charge +79e). What is the electrical force acting on the electron when it is 1.7 x 10-14 m away from the gold nucleus? (e 1.6 x 10-19 C, ke 8.99 x 109 N-m2/C2) b-A capacitor is made by taking two sheets of aluminum foil, each 0.022 mm thick and placing between them a sheet of paper which comes from a ream of 580 sheets, the ream being 5.4 cm thick with sheets measuring 216 mm by 279 mm Practice problems for exam 1 Page 7 (the usual 8 1/2 by 11). What is the capacitance of the capacitor made this way if the dielectric constant of the paper is 3.7? (EO 8.85 x 10-12 C2 /N x m2 ) c-A point charge of +4.0乢is located at the origin of a coordinate system and a second point charge of-66 HC is at x = 1.7 m. What is the electric potential at the x 0.85 m point? (ke-8.99 x 109 N m2/C2) d- Very large capacitors have been considered as a means for storing electrical energy. If we constructed a very large parallel-plate capacitor of plate area 1.85 m2 using paper (κ = 3.7) of thickness 1.5 mm as a dielectric, how much electrical energy would it store at a plate voltage of 1 500 V? (EO- 8.85 x 10-12 C2 /N-m2)

Answer 1

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