An infinitely long line of charge has linear charge density 5 x 10-12 C/m. A proton is at distance 13 cm from the line and moving directly toward the line at speed 0.5 × 103 m/s. How close (in cm) does the proton get to the line of charge?
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- A circular ring of charge with radius b has total charge q uniformly distributed around it. What is the magnitude of the electric field at the center of the ring? (a) 0 (b) keq/b2 (c) keq2/b2 (d) keq2/b (e) none of those answersFind an expression for the magnitude of the electric field at point A mid-way between the two rings of radius R shown in Figure P24.30. The ring on the left has a uniform charge q1 and the ring on the right has a uniform charge q2. The rings are separated by distance d. Assume the positive x axis points to the right, through the center of the rings. FIGURE P24.30 Problems 30 and 31.aA plastic rod of length = 24.0 cm is uniformly charged with a total charge of +12.0 C. The rod is formed into a semicircle with its center at the origin of the xy plane (Fig. P24.34). What are the magnitude and direction of the electric field at the origin? Figure P24.34
- A point charge of 4.00 nC is located at (0, 1.00) m. What is the x component of the electric field due to the point charge at (4.00, 2.00) m? (a) 1.15 N/C (b) 0.864 N/C (c) 1.44 N/C (d) 1.15 N/C (e) 0.864 N/CA proton is fired from very far away directly at a fixed particle with charge q = 1.28 1018 C. If the initial speed of the proton is 2.4 105 m/s, what is its distance of closest approach to the fixed particle? The mass of a proton is 1.67 1027 kg.A particle with charge q on the negative x axis and a second particle with charge 2q on the positive x axis are each a distance d from the origin. Where should a third particle with charge 3q be placed so that the magnitude of the electric field at the origin is zero?
- Is it possible for a conducting sphere of radius 0.10 m to hold a charge of 4.0 C in air? The minimum field required to break down air and turn it into a conductor is 3.0 106 N/C.An electron starts from rest 2.81 cm from the center of a uniformly charged sphere of radius 2.08 cm. If the sphere carries a total charge of 1.13×10-⁹ C, how fast will the electron be moving when it reaches the surface of the sphere? 300 m/s Submit Answer Incorrect.An infinitely long line of charge has a linear charge density of 5.50×10−12 C/m. A proton is at a distance of 12.5 cm from the line and is moving directly toward the line with a speed of 1500 m/s. How close does the proton get to the line of charge?
- An infinitely long line of charge has a linear charge density of 6.00×10−12 C/m . A proton is at distance 17.5 cm from the line and is moving directly toward the line with speed 2300 m/s . How close does the proton get to the line of charge?The drawing shows a proton with a speed v = 2.9 × 106 m/s moving toward a very long positively-charged plate with a charge density σ = 2.6 × 10-5 C/m2. What is the magnitude of the acceleration of the proton, in meters per squared second, as it approaches the charged plate?An infinitely long line of charge has linear charge density 6.00×10−12 C/mC/m. A proton (mass 1.67××10−27−27 kgkg, charge +1.60××10−19−19 CC) is 18.0 cmcm from the line and moving directly toward the line at 4.10×103 m/sm/s. Calculate the proton's initial kinetic energy. Express your answer with the appropriate units. How close does the proton get to the line of charge? Express your answer with the appropriate units.
