3. Roughly estimate the number of coulombs of positive charge in a glass of water. Let the volume be 250 cubic centimeters. (This problem will not be on a lecture quiz).
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- A negatively charged balloon has a 6.7 uC charge. How many excess electrons are on this balloon?13. A charge q = 5 µC is located at the coordinates (0, 4 cm) as shown below. What is the magnitude of electric field at point P, located at (3 cm, 0) due to q? A. 1.8×10³ N/C B. 1.8×104 N/C C. 1.8×105 N/C D. 1.8×106N/C E. 1.8×10¹ N/C 4 cm q=5μC 3 cm P5 a. How many electrons are needed to form a charge of Q1 = -7 nC? b. If you touch two charge balls of - 60 nC and 70 nC, what will be the net charge after touching them together?
- The figure below shows the electric field lines for two charged particles separated by a small distance. 92 (a) Determine the ratio q,/q2. 0.33 This is the correct magnitude for the ratio.2. Four charges are fixed in place on a line and adjacent charges are equally separated by a distance d = 2.5 m as shown in the figure below. The are q₁ = 1.0 x 10-5 C, 92 = -3.0 x 10-5 C, q3= -4.6 × 10- C, and charges are 943.2 x 10-5 C. (a) Calculate the net force (magnitude and direction) on charge q. (b) Calculate the net force (magnitude and direction) on charge 92. 91 do bid bord 93 92 945. In the figure below, three hollow, concentric spherical conductors are charged as follows: The inner sphere carries a charge +4Q, the middle sphere carries a charge -20. and the outer sphere carries a charge +6Q. What is the charge on the outer surface of the middle sphere? Outer sphere (A) Zero (C) +4Q (E) +2Q (B)-Q (D)-2Q Middle sphere field at a point that is 0.50 m from the center of the sphere is 15x10' N/C and is directed 6. Electric charge is uniformly distributed inside a sphere of radius 0.30 m. The electric radially outward. The maximum magnitude of the electric field in N/C is: +++++ R (A) 25x10 (B) 20x10' (C) 36x10 (D) 42x10² (E) 48x10 7. Electrically neutral objects cannot exert an electrical force on each other, but they can exert a gravitational force on each other. A) True B) False 8. A charge of uniform volume density (40 nC/m3) fills a cube with 8.0-cm edges. What is the total electric flux through the surfaces of this cube in (N.m²/C)? (A) 2.9 (B) 2.0 (C) 2.6 (D)…
- 3. An isolated system consists of two metal spheres, with sphere 2 having twice the radius of sphere 1. Both spheres are initially charged as shown in the initial figure. The two spheres are then brought into contact with each other so that charge, in the form of electrons, is transferred between them. The spheres are then separated as shown in the final figure, where they have unknown charges, q and q2. Since sphere 2 has twice the radius, it will have twice the amount of charge than sphere 1 in the final state. Find q, q and the number of electrons transferred between the spheres. Hint: The net charge of the two-sphere system is conserved, since it is an isolated system. initial electron transfer between spheres final 91 = +12.0 μC 9₁ = ? q2 = -3.00 μC 9₂ = ?Two identical conducting spheres are charged with a net charge of +2.0 q on the first sphere and a net charge of -4.0 q on the second sphere. The spheres are brought together, allowed to touch, and then separated. What is the total charge on the two spheres? a. +6.0 q b. +2.0 q c.-2.0 q d. -6.0 q e. None of the above4. Three identical metal balls A, B, and C are mounted on insulating rods. Ball A has a charge +q and balls B and C are initially uncharged (g is the usual symbol for electric charge). Ball A is touched first to ball B and then separately to ball C. At the end of this experiment, the charge on ball A is A. +g/2. B. +g/3. C. +g/4. D. none of the answers