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- A high-energy proton accelerator produces a proton beam with a radius of r - 0,90 mm. The beam current is I=9.00A and is constant. The charge density ofthe beam is n = 6.001011 protons per cubic meter, (a)What is the current density of the beam? (b) What is the drift velocity of the beam? (c) How much time does it take for 1.0010 m protons to be emitted by the accelerator?Thor has two square prism conductors that are made of the same ohmic material and with properties indicated below. Conductor | Length | Cross-Section Side Length Alpha L Beta L/2 8/4 Suppose both conductors are subject to the same potential difference AV across their length while keeping their temperatures fixed. Which of the following is the correct relation between the electric currents, Ia and IB, through Alpha and Beta? A. Ia = 81g B. 8Ia = I8 C. Ia = 4Ig D. 4Ia = I8Q1 /A piece of metal is its length 5m and its cross-sectional area 0.5 mm^2 and the specific resistance of the metal is 81.6*10^6 Q– m Note that the density of The substance is 8.96 kg/m^3 and the atomic weight 63.54 calculate: 1) Calculate the motion of the electron (H). 2) Calculate the mean free time (7). 3) If you know that the density of electrons along the x-coordinate increases according to the relationship n = 1030 + 8 * 1033x + 15 * 1036 x2 The temperature is 290k, so what is the value of the diffusion current Id at the metal surface x=0 3) If the value of the propagation current is Id at the distance x From the surface of the metal are 91.2*10^10 A/m2 What is the value of x
- mid 9634&page 3 A conductor has a cross-sectional area of 2.3x 10 m and the number of free electrons per unit volume is 8.5x 104 electron/m'. When the current is 10.2 A, find the drift speed (in mm/s) of the electrons. Use the charge of the electron to be 1.6x 10 C. Select one: OA. 0.43 OB. 0.33 OC. 32.61 OD. 0.22 OE. 42.81 page Next page 9:03 P A OD A de ENG 4/30/20 nert 17 V Badapace Nom Sok Y 7 GYH K 4. 15 Enter BYN M 1 Shift End Ead5. The current density in a particle beam with circular cross section of radius a points along the beam axis with a magnitude that decreases lincarly with Jo at the center r = 0 to half that value at the edge r = a. (a) Find a lincar function J (r) that describes the particle beam. (b) Find an expression for the total current in the beam.4. Calculate the number of ion pairs produced by an electron with kinetic energy of 1.0 MeV passing through a 30 mm thick ionization chamber. What is the total charge of electrons? If a hundred such particles pass through the chamber each second and all the ions are collected at the electrodes what is the total current? (The density of the gas is 1.3 kg/m³, the mass stopping power for air for 1.0 MeV is 1.67 MeV/(g/cm2) and it takes about 34 eV to produce an ion pair in air).
- 1.For copper, α = 3.9×10−3 ∘C−1. Suppose 2.5-m-long, 0.40-mm-diameter copper wire is connected across the terminals of a 1.5 V ideal battery. What is the current in the wire at 20∘C? 2.What is the rate, in A/∘C, at which the current changes with temperature as the wire heats up?You are given 1.0 [g] of aluminum (mass density = 2700 kg/m3) and asked to make a wire, using all the aluminum, that will dissipate 7.5 [W] when connected to a 1.5 [V] battery. What length and diameter will you choose for your wire?Conduc-Thor-s. Thor has two square prism conductors that are made of the same ohmic material and with properties indicated below. Conductor Length | Cross-Section Side Length Alpha L Beta L/2 s/4 Suppose both conductors are subject to the same potential difference AV across their length while keeping their temperatures fixed. Which of the following is the correct relation between the electric currents, Ia and IB, through Alpha and Beta? O A. Ia = 8IB O B. 8Ia = Ig O. Ia = 4I8 O D. 4Ig = Ig Clear my choice
- A rod of length 2.3 m, with a rectangular cross section (1.5mm x 3.0 mm) is made ofa material with a resistivity of 6.1 × 10^-8 Ohm. A potential difference of 5.0 V isplaces across the ends of the rod.a. Draw a clear physics diagram of the problem.b. At what initial rate is heat generated in the rod?c. Will the rate from part (b) increase, decrease, or remain constantover time, as the rod remains connected to the 2.5 V potential difference?Explain brieflyA battery will be used to power the room for 8 hours a day. A battery cell is rated at 6V, 2AH with with a maximum depth of discharge of 80%. How many battery cell will you need for 2 days of autonomy? Select one: a. 6 O b. 5 O c. 10 O d. 82. The clectron beam inside a television picture tube is 0.40 mm in diameter and carrics a current of 50 µA. This clectron beam impinges on the inside of the picture tube screen. (a) How many electrons strike the screen cach second? (b) What is the current density in the clectron beam? (c) The clectrons move with a velocity of 4.0 × 107 m/s. What clectric ficld strength is needed to accelerate clectrons from rest to this velocity in a distance of 5.0 mm? (d) Each clectron transfers its kinctic energy to the picture tube screen upon impact. What is the power delivered to the screen by the clectron beam?