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The total electric flux from a cubical box 15.0 cmcm on a side is 1.90×103 N⋅m2/CN⋅m2/C .What charge is enclosed by the box?
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- The electric field 10.0 cm from the surface of a copper ball of radius 5.0 cm is directed toward the ball’s center and has magnitude 4.0 × 102 N/C. How much charge is on the surface of the ball?.A square metal plate with a thickness of 1.5 cm has no net charge and is placed in a region of uniform electric field 8.0 x 104 N/C directed perpendicularly to the plate. Find the resulting surface charge density on each face of the plate.A thin, square, conducting plate 54.0 cm on a side lies in the xy plane. A total charge of 3.20 x 10-8 C is placed on the plate. You may assume the charge density is uniform. (a) Find the charge density on each face of the plate. C/m² (b) Find the electric field just above the plate. magnitude N/C direction upward ◊ (c) Find the electric field just below the plate. magnitude N/C direction downward ↑
- 1. The figure shows a section of a long, thin-walled metal tube of radius R = 7.95 cm, with a charge per unit length A = 2.11 x 10-8 C/m. What is the magnitude E of the electric field at radial distance r = 14.6 cm. R (a) 2.60x10³ N/C (b) 2.45x10³ N/C (c) 2.75x10³ N/C (d) 2.68x10³ N/C (e) None of the aboveThe following information is given about the insulating sphere and the conductive spherical shell in the figure: a = 5 cm, b = 20 cm, c = 25 cm. The electric field at a distance of 10 cm from the center is 3.6x10 ^3 N / C and radially inward. At a distance of 50 cm from the center, the electric field is 2.0x102 N/ C radially outward. What is the charge on the insulating sphere nc? Insulator A) -5 C) -4 Conductive B) -3 D) -2 E) -1A conducting sphere of radius 10 cm has an unknown charge. If the electric field 20 cm from the centre of the sphere is 1.5 x 103 N/C and points radially inward, what is the net charge on the sphere?
- A thick insulating spherical shell of inner radius a=2.4R and outer radius b=6.1R has a uniform charge density p. pR What is the magnitude of the electric field at r=5.6 R ? Express your answer using one decimal place in units of €oThe total electric flux from a cubical box 28.0 cm on a side is1.84×103 N·m2/C. What charge is enclosed by the box? (1.0μC= 1.0×10^−6C , e0= 8.85×10^−12C^2/N·m^2 k= 8.99×10^9N·m^2/C^2, Charge of electron = 1.6×10^-19C)A conducting sphere of radius 10 cm has an unknown charge. If the electric field 20 cm from the centre of the sphere is 1.5 × 103 N/C and points radially inward, what is the net charge on the sphere?