In the Millikan Oil Drop experiment, Robert Millikan and Harvey Fletcher determined the elementary electric charge. By dropping negatively charged oil drops through an electric field, they balanced the downwards force of gravity with an upwards electric force. You conduct a similar (hypothetical) experiment by levitating a negatively charged oil drop by placing a positive charge of q = 2.36 x 10-⁹ C a distance d = 0.0050 meters directly above it. The drop has m = 4.17 x 10-14 kg. From this information, determine the charge on the oil drop. с

Two identical point charges (q= +2.20 x 106 C) are fixed at opposite corners of a square whose sides have a length of 0.450 m. A test charge (qo = -3.10 x 108 C), with a mass of 9.40 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 VR ·90

One particle has a mass of 3.71 x 103 kg and a charge of +7.56 μC. A second particle has a mass of 7.17 x 103 kg and the same charge. The two particles are initially held in place and then released. The particles fly apart, and when the separation between them is 0.177 m, the speed of the 3.71 x 103 kg-particle is 126 m/s. Find the initial separation between the particles. V1,B V2,B 92 92 91 Number i 0.011 Units m "B 91

Two electrons are passing 25.0 mm apart. What is the electric repulsive force that they exert on each other? (The value of k is 9.0 x 109 N-m2/C2.) O 3.7 x 10-25 N O 3.7 x 10-27 N 1.4 N O 1.4 x 1010 N

Problem 3: Three charges are located as shown in the figure, with values q = 4.9 x 10-16 C, 92 = -1.8 x 10-16 C, 93 = 6.75 x 10-16 C. The charges are separated by d7 = 2.3 × 10-6 m and dz = 1.4 x 10-6 m. 93 d, Otheexpertta.com Part (a) What is the force of g2 ong in the x direction, F,? Give your answer in newtons, and recall k= 8.988 x 10° N m2/C2. F= 1.5 * 10-10 F = 1.5E-10 Correct! Part (b) What is the force of q3 on q in the y direction, F,? Give your answer in newtons. Grade Summary Fy = 1.51 * 10-9 Deductions 2% Potential 98%

Two dust particles, each with a charge of 1 x 10-7 C, experience a force of 4 N. How far apart are the particles?

A (closed) system contains charges, Q₁ = 2.94 C, Q₂ = -3.64 C and Q3 = -1.52 C. What is the net charge in this system?

Spheres A, B and C have charges +8.0 C, +12.0 C, and -5.0 C, respectively. The three spheres are allowed to touch each other simultaneously and then separated. What is the total charge on the three spheres before and after touching each other?