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OSU PHYSICS 1251 - HW 2

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2/23/2014 HW 2http://www.webassign.net/web/Student/Assignment-Responses/last?dep=8448409 1/9Current Score : 25 / 25 Due : Thursday, January 30 2014 02:30 PM EST1. 1/1 points | Previous Answers SerPSE8 23.QQ.004.A test charge of +3 µC is at a point P where an external electric field is directed to the right andhas a magnitude of 4 ✕ 106 N/C. If the test charge is replaced with another test charge of 3 µC,the external electric field at P does which of the following? HW 2 (Homework)Tyler Bogard125112:40, Spring 2014Instructor: Sharvil DesaiWebAssignThe due date for this assignment is past. Your work can be viewed below, but no changes can be made. is unaffectedreverses direction changes in a way that cannot be determined2/23/2014 HW 2http://www.webassign.net/web/Student/Assignment-Responses/last?dep=8448409 2/92. 1/1 points | Previous Answers SerPSE8 23.QQ.005.Rank the magnitudes of the electric field at points A, B, and C shown in the figure below (greatestmagnitude first). C > A > BC > B > A B > A > C A > B > CB > C > AA > C > B2/23/2014 HW 2http://www.webassign.net/web/Student/Assignment-Responses/last?dep=8448409 3/93. 3/3 points | Previous Answers SerPSE8 23.P.041.WI.The figure below shows the electric field lines for two charged particles separated by a smalldistance.(a) Determine the ratio q1/q2.1/3 0.333 (b) What are the signs of q1 and q2?q1 negative negativeq2positive positive 4. 2/2 points | Previous Answers SerPSE8 23.P.020.A small object of mass 3.70 g and charge 16.3 µC is suspended motionless above the groundwhen immersed in a uniform electric field perpendicular to the ground. What are the magnitudeand direction of the electric field?magnitude 2224.53 2220 N/Cdirection downward downward 2/23/2014 HW 2http://www.webassign.net/web/Student/Assignment-Responses/last?dep=8448409 4/95. 4/4 points | Previous Answers SerPSE8 23.P.022.WI.Three charged particles are at the corners of an equilateral triangle as shown in the figure below.(Let q = 2.00 µC, and L = 0.550 m.)(a) Calculate the electric field at the position of charge q due to the 7.00µC and −4.00µCcharges.14.86 14.9 kN/C + 180.161 180 kN/C (b) Use your answer to part (a) to determine the force on charge q.29.72 29.7 mN + 360.322 360 mN 2/23/2014 HW 2http://www.webassign.net/web/Student/Assignment-Responses/last?dep=8448409 5/96. 4/4 points | Previous Answers SerPSE8 23.P.023.Three point charges are located on a circular arc as shown in the figure below. (Take r = 3.92 cm.Let to the right be the +x direction and up along the screen be the +y direction.)(a) What is the total electric field at P, the center of the arc? = 1.87E4 18700 + 0 0 (b) Find the electric force that would be exerted on a 4.6–nC point charge placed at P. = 8.6014E5 8.6e05 + 0 0 7. 2/2 points | Previous Answers SerPSE8 23.P.024.Two charged particles are located on the x axis. The first is a charge +Q at x = a. The second isan unknown charge located at x = +3a. The net electric field these charges produce at the originhas a magnitude of 2keQ / a2. What are the two possible values of the unknown charge? negative value:  9 9 ✕ Qpositive value: + 27 27 ✕ Q 2/23/2014 HW 2http://www.webassign.net/web/Student/Assignment-Responses/last?dep=8448409 6/98. 3/3 points | Previous Answers SerPSE8 23.P.046.Two horizontal metal plates, each 10.0 cm square, are aligned 1.00 cm apart with one above theother. They are given equalmagnitude charges of opposite sign so that a uniform downwardelectric field of 1.86 103 N/C exists in the region between them. A particle of mass 2.00 1016kg and with a positive charge of 1.02 106 C leaves the center of the bottom negative plate withan initial speed of 1.05 105 m/s at an angle of 37.0° above the horizontal.(a) Describe the trajectory of the particle.(b) Which plate does it strike?(c) Where does it strike, relative to its starting point? (Enter the horizontal distance fromthe initial position.)0.001115 0.00112 m 9. 2/2 points | Previous Answers SerPSE8 23.P.059.MI.A charged cork ball of mass 1.10 g is suspended on a light string in the presence of a uniformelectric field as shown in the figure below. When = (1.00 + 5.40 ) ✕ 105 N/C, the ball is inequilibrium at θ = 37.0°.a straight linea circle a parabolaa helix negative platepositive plate It does not strike either plate.E2/23/2014 HW 2http://www.webassign.net/web/Student/Assignment-Responses/last?dep=8448409 7/9(a) Find the charge on the ball.1.60248E8 1.60e08 C(b) Find the tension in the string.0.00266 0.00266 NMaster ItA charged cork ball of mass 3.00 g is suspended on a light string in the presence of a uniformelectric field as shown in the figure below. When


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