Understanding Electric Forces: Point Charges and Geometry
School
Worcester Polytechnic Institute**We aren't endorsed by this school
Course
PHYSICS 1120
Subject
Physics
Date
Dec 11, 2024
Pages
4
Uploaded by MagistrateHerring4704
Conceptual Question 21.04 Practice v PartA A point charge @ is located a short distance from a point charge 3(Q), and no other charges are present. If the electrical force on () is F', what is the electrical force on 3Q)? F FA3 F1/3 3F Previous Answers v Correct Problem 21.59 . Practice v PartA Find the x-component of the total force exerted on the third charge by the other two. A charge 4.97 nC is placed at the origin of an xy-coordinate system, and a charge -2.05 nC is placed on the positive x-axis at Express your answer in newtons. z =3.98 cm . A third particle, of charge 6.04 nC is now placed at the point £ =3.98 cm , ¥y =2.97 cm . F, = 877x105 N Previous Answers « Correct 4 Part B Find the y-component of the total force exerted on the third charge by the other two. Express your answer in newtons. F,= _6.07x10° N Previous Answers v Correct
Problem 21.59 Practice A charge 4.97 nC is placed at the origin of an xy-coordinate system, and a charge -2.05 nC is placed on the positive x-axis at x =3.98 cm . A third particle, of charge 6.04 nC is now placed at the point x =3.98 cm , ¥y =2.97 cm . v PartC Find the magnitude of the total force acting on the third charge. Express your answer in newtons. F = 1.067x104 N Previous Answers « Correct v PartD Find the direction of the total force acting on the third charge. Express your answer in radians. $= -0.606 radians between F' and +x-axis Previous Answers « Correct Problem 21.71 Practice v Three identical point charges g are placed at each of three corners of a square of side L. Figure 1of2 [ > 1 2 e ® s i ' ' : H : (©) : v : E ' ' ! \ SRR ® 3 Part A Find the magnitude of the net force on a point charge —3q placed at the center of the square.(Figure 1) Express your answer in terms of the variables g, L and constant k. | lg-—34q| ‘ ()" k F=<( 1 2 1 2 Previous Answers « Correct Part B Find the direction of the net force on a point charge —3q placed at the center of the square. ( \ ‘ force is directed toward the charge g» ‘
Problem 21.71 Practice v Correct Three identical point charges g are placed at each of three corners v PartB of a square of side L. Find the direction of the net force on a point charge —3q placed at the center of the square. 1 } force is directed toward the charge g | Figure 1o0f2 (> force is directed away from the charge g» force is directed toward the charge q; | force is directed toward the charge g3 Previous Answers v Correct v PartC Y S Find the magnitude of the net force on a point charge —3q placed at the vacant corner of the squa Problem 21.71 Practice v Correct Three identical point charges g are placed at each of three corners of a square of side L. v PartC Find the magnitude of the net force on a point charge —3q placed at the vacant corner of the square.(Figure 2) Express your answer in terms of the variables g, L and constant k. 2 N . Sin(i)# +k(|q.;23q|) 4 & w +k(lq~;23ql) Figure 1of2 (> 2 Previous Answers v Correct s e O v PartD Find the magnitude and direction of the net force on a point charge —3q placed at the vacant corner of the square. ( ]
Problem 21.71 Practice Previous Answers « Correct Three identical point charges g are placed at each of three corners of a square of side L. ¥ PartD Find the magnitude and direction of the net force on a point charge —3q placed at the vacant corner of the square. Figure 9 tof2 2 force is directed toward the charge go force is directed away from the charge g2 force is directed toward the charge q1 Previous Answers 2 @-----meemmeees ’ force is directed toward the charge g3 : \ | i ! + Correct O