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I'm having a hard time understanding a concept and I'd like to chat with you in the comments. Please write big and legibly when showing your work.
I'm having a hard time understanding a concept and I'd like to chat with you in the comments. Please write big and legibly when showing your work. Physics 152 Fall 2017 Lecture-Tutorial for Lecture #7A-wed. Sept. 6 Electric Potential (Voltage) & Electric Potential Energy Bend: OpenStax §19.1: Electric Potential (Voltage) & Electric PE 19.3: Voltage & PE for Point Charges 1. What is the change in electric potential energy for a charge 800-volt potential, if that is moved from a 500-volt potential to an A. 5.0 x 10" B. 45x 10 C. 50x 10 D. 30 x 10 E. 15 x 10 A. 1.0eV B. 15 eV C. 300ev D. 500 e E. 800 eV A. same as answer to part (b) B, negative of answer to part (b) 2.a. An ion with a charge of +3e is initially located at a potential of 250 kV. Suppose that the ion moves to a lower potential, thereby losing 750 cV of electric potential energy what is the electric potential at the ion's final location? b. Suppose that an efectron makes the same trip as the kon did in the previous question, moving between the same two electrie potentials What is the electron's change in electrie potential energy? Dees it gain ce lose electric polential energy?

Explanation / Answer

1) Given,

V1 = 50V ; V2 = 80 V ;

a)q = 50 uC = 50 x 10^-6 C

U = q (V2 - V1)

U = 50 x 10^-6 (80 - 50) = 1.5 x 10^-3 J

Hence, (E)1.5 x 10^-3 J

2)q = +e = 1.6 x 10^-19

U = q (V2 - V1)

U = 1.6 x 10^-19 (80 - 50) = 4.8 x 10^-18 J = 30eV

Hence, (E)30 eV

c)q = -e = -1.6 x 10^-19

U = q (V2 - V1)

U = -1.6 x 10^-19 (80 - 50) = -4.8 x 10^-18 J = -30eV

Hence, (E)-30 eV

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