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Author Question: Point charges of equal magnitudes (25 nC) and opposite signs are placed on (diagonally) opposite ... (Read 103 times)

penza

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on: Jul 28, 2018
Point charges of equal magnitudes (25 nC) and opposite signs are placed on (diagonally) opposite corners of a 60-cm  80-cm rectangle. If point A is the corner of this rectangle nearest the positive charge and point B is located at the intersection of the diagonals of the rectangle, determine the potential difference, VB - VA.
 a. -47 V
  b. +94 V
  c. zero
  d. -94 V
  e. +47 V

Question 2

An alpha particle (m = 6.7  10-27 kg, q = +3.2  10-19 C) has a speed of 20 km/s at point A and moves to point B where it momentarily stops. Only electric forces act on the particle during this motion. Determine the electric potential difference VA - VB.
 a. +4.2 V
  b. -4.2 V
  c. -9.4 V
  d. +9.4 V
  e. -8.4 V


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rleezy04

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Reply #1 on: Jul 28, 2018
Answer to Question 1

D

Answer to Question 2

B


penza

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Reply #2 on: Jul 28, 2018
Both answers were spot on, thank you once again


rleezy04

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Reply #3 on: Jul 28, 2018
Great! Please up vote :D


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