m, q E A constant electric field of E = 6.5 j N/C is set up between two parallel plates An object with mass m = 9 ug and charge q = -4.2 mC starts at the bottom pla with an initial upward speed of v. It reaches a maximum height of h = 33 cm. %3D The initial speed of the charge is given by m/s
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- MY N An electron is to be accelerated in a uniform electric field having a strength of 1.90 x 106 v/m. (a) What energy in kev is given to the electron if it is accelerated through 0.790 m? kev (b) Over what distance would it have to be accelerated to increase its energy by 50.0 GeV (as in the Stanford Linear Accelerator, which is actually smaller than this)? km Additional Materials7The separation distance between the two plates of a parallel plate capacitor is 2.47 cm. An electron is at rest near the negative plate. When it is released, it accelerates and reaches the positive plate with a kinetic energy of 6.30 10-15 J.What is the magnitude of the electric field in the region between the plates of the capacitor?
- Two 3.7-g spheres are suspended by 13.5-cm-long light strings (see the figure). A uniform electric field is applied in the x-direction. If the spheres have charges of -4.5 x 10-8 C and +4.5 x 10-8 C, determine the electric field intensity that enables the spheres to be in equilibrium at 8 16°. N/C Ē @ AA proton is fired from very far away directly at a fixed particle with charge q = 1.90 x 10-18 C. If the initial speed of the proton is 1.9 x 105 m/s, what is its distance of closest approach to the fixed particle? The mass of a proton is 1.67 x 10-27 kg. X The correct answer is not zero. m Submit AnswerWhich of the following statements is false for a conductor in electrostatic equilibrium. a. The charge on the conductor is always distributed uniformly throughout the conducting material b. The electric potential inside the conductor is constant. c. The electric field at the surface of the conductor is perpendicular to the surface everywhere. d. The electric field inside the conducting material is zero. e. Any excess charge resides solely on the surface of the conductor.
- A point charge, q = -8.0 µC, moves for a distance of 80 cm at an angle of 900 relative to the direction of a uniform electric field of strength 500 N/C. What is the magnitude of the change in potential energy for the charge? a. 6.4 mJ b. 9.6 mJ c. 0.00 mJ d. 3.2 mJ e. 12.8 mJ-6.0 x 10¹5 C N >E 2.0 m - 6.0 x 105 C 3.0 m 4.0 x 10-5C A 9₂ 3.0 m 2.0 m 2 -3.0 x 10-5 C • A a. Determine the net electric field at point A. b. The magnitude of the electric field due to each charge, (i.e. calculate 1 and ₂), at point A. a. For each part in practice question 1, find the net force on a -1.2 × 10-5 C charge placed at point A. b. How would your answer change if the sign of the charge from 2a at point A was changed?View Policies Current Attempt in Progress A capacitor is constructed of two concentric conducting cylindrical shells. The radius of the inner cylindrical shell is 2.35 x 103 m, and that of the outer shell is 2.47 x 10 m. When the cylinders carry equal and opposite charges of magnitude 2.0 x 10 10 C, the electric field between the plates has an average magnitude of 3.9 x 10 V/m and is directed radially outward from the inner shell to the outer shell. Determine (a) the magnitude of the potential difference between the cylindrical shells and (b) the capacitance of this capacitor. +] Cylindrical capacitor (end view)
- A parallel-plate capacitor is formed from two 5.8 cm -diameter electrodes spaced 1.9 mm apart. The electric field strength inside the capacitor is 1.0 ×106N/C. What is the charge (in nC) on each electrode?2e ++ 2003 Thomson Brooks Cole v=0 + Figure P16.19 + 79e + |—d — + + + + (c16p19) In Rutherford's famous scattering experiments (which led to the planetary model of the atom), alpha particles (having charges of +2e and masses of 6.64×10-27 kg) were fired toward a gold nucleus with charge +79e. An alpha particle, initially very far from the gold nucleus, is fired at 4.60×107 m/s directly toward the gold nucleus as in Figure P16.19. How close does the alpha particle get to the gold nucleus before turning around? Assume the gold nucleus remains stationary.