Find the magnitude and direction of the electric field acting at the coordinate, x = 15 cm, in the diagram below. Assume that k = 9.00 х 109 Nm2 C2 3.0 6.0 9.0 12 15 18 x(cm) 91 = +8.00 pC q2 = +5.00 pC O a. 58.9 N/C to the left O b.3.50 x 10 N/C to the right c. 58.9 N/C to the right O d. 2.20 x 105 N/C to the right e. 3.50 x 10' N/C to the left

4. The charge per unit length on a long, straight filament is -94.0 µC/m. a. Find the electric field 10.0 cm from the filament. Distances are measured perpendicular to the length of the filament. (Take radially inward toward the filament as the positive direction.) MN/C b. Find the electric field 27.0 cm from the filament. MN/C c. Find the electric field 130 cm from the filament. MN/C

8. Three point-like charges are placed as shown in the figure, a = 38.0 cm and b = 54.0 cm. The charge (93) is placed +1.80 µC, 92 = -4.20 μC, half way on the (b) side. Find the magnitude of the electric field at the top left corner. Let q₁ and q3 +5.10 μc. N/C 92

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7. A-10 µC charge is located at the origin. What is the strength of the electric field at the position (x.y) = (-5.0cm, 5.0cm)?

Let q 1 = 2 μC, q2 = -4 μC, q3 = = +3 μC, q4 = -5 μC, q5 = +9 μC.a. What is the net force on q 5 ?b. What is the electric field at the location of q 5 due to the other 4 charges?c. What would be the force on q 5 if you changed it to 7 μC?

2. A 4.50 µC test charge is in the presence of an electric field where the strength E is 2.30 x 105 N/C. What is the magnitude of the electric force on the test charge? 4.5 X10 A. 1.94 N B. 1.61 N C. 1.35 N O D. 1.04 N

4. Electric fields of varying magnitudes are directed either inward or outward at right angles on the faces of a cube, as shown in the figure. What is the strength and direction of the field on the face F? 15.0 N/C A 25.0 N/C B 20.0 N/CE 10.0 NIC D 20.0 N/C A. The field on the face F is 60.0 N/C out of the face of the cube. B. The field on the face F is 60.0 N/C into the face of the cube. C. The field on the face F is 60.0 N/C into the face of the cube. D. None of the above

Suppose Q1 = 6.0 nC and Q2 = 7.0 nC (Figure 1). You may want to review (Pages 631 - 635). Figure +2₁ 10 cm 5.0 cm +2₂ y -X Part B What is the direction of the electric field at the position indicated by the dot in (Figure 1)? Specify the direction as an angle measured counterclockwise from the positive x axis. — ΑΣΦ 0 = 8.08 Submit C Provide Feedback Previous Answers Request Answer ? X Incorrect; Try Again; 3 attempts remaining O Next >

How many excess electrons must be uniformly distributed throughout the volume of an insulating sphere with radius 8cm in order to produce an electric field of 1350N/C on the surface of the sphere? (Take 1/4T€0 2 9 × 10°N. m2/C2 and le = 1.6 × 10–1ºC) O a. 6.0 x 10° O b. 1.5 x 107 O. 8.0 x 106 O d. 7.6 x 107 O e. 3.6 x 10° O f. 1.2 x 1010 O g. 7.2 x 10 O h. 4.8 x 108