Three charges, q1 =+q, q2 = +q, and q3 = -q, are located at the corners of an equilateral triangle with side length of d = 15 cm. The charge q = +7 µC. %3D Calculate the work required to bring another charge +q from infinity to point P midpoint of q2 and q3. charge #2 +g charge #1 +q d point P AY charge #3 O a. 3.39 J O b. -2.94 J Oc. 15.15 J O d. 9.80 J O e Zero

The figure below shows three charges at the corners of a rectangle of length x = 0.65 m and height y = 0.42 m. What is the minimum amount of work needed by an external force to move the +2.7 µC charge to infinity?

IP A particle with a mass of 4.0 g and a charge of +5.0x10-2 μC is released from rest at point A in the figure (Figure 1). Figure Ag 3.0 cm во 5.0 cm 4.0 cm OC E 1 of 1 L X > In which direction will this charge move? Positive Y- direction Negative y- direction Negative x-direction Positive x-direction Submit Part B V= Request Answer What speed will it have after moving through a distance of 5.5 cm ? The electric field has a magnitude of 1600 N/C Express your answer using two significant figures. 15. ΑΣΦ SFR P Pearson ? m/s

Two identical point charges (q = +1.00 x 10-6 C) are fixed at opposite corners of a square whose sides have a length of 0.420 m. A test charge (90 = -7.50 × 10-8 C), with a mass of 2.80 x 10-8 kg, is released from rest at one of the corners of the square. Determine the speed of the test charge when it reaches the center of the square. Number i Units .90 VB

Two charges Q1= -48 µC and Q2= -21 µC are placed on the two corners of a square as shown in the figure below. If the side length of the square is a=48 mm, how much work is required to bring a third charge, Q3= -28 µC from infinitely far away to the empty bottom-right corner of the square? Please take k = 9.0 x 109 N.m2/c2 and express your answer using one decimal place in units of J or N.m. Please do not forget to type the minus sign if you got a negative value. Q1 а а а Q2 а

A small plastic ball with a mass of 6.65 10-3 kg and with a charge of +0.149 µC is suspended from an insulating thread and hangs between the plates of a capacitor (see the drawing). The ball is in equilibrium, with the thread making an angle of 30.0° with respect to the vertical. The area of each plate is 0.0138 m2. What is the magnitude of the charge on each plate? C

Two m = 5.8 g point charges on 1.0-m-long threads repel each other after being charged to q = 80 nC, as shown in the figure. (Figure 1) Figure 1.0 m m + 9 00 1.0 m +m 9 1 of 1 Part A What is the angle 0? You can assume that is a small angle. Express your answer to two significant figures and include the appropriate units. μ 0 = 4.21 Submit μÅ Ω % À X Previous Answers Request Answer ? X Incorrect; Try Again; 7 attempts remaining

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d -3q Q d d +9Q3 Q-3q d For the given figure only charge Q, mass of 3.0 g, can move which is initially at rest. Charges Q and Q are fixed. What is the kinetic energy of the charge Q, when it reaches the origin? (Take q = 400 uC and d= 2.3 mm) OA) 1.4 x 106 J Os 1.1 x 10+ J O c) 14 x 10s J 14 x 10 J 1.1 x 106 J