Part A (Figure 1) shows a mass spectrometer, an analytical instrument used to identify the various molecules in a sample by measuring their charge-to-mass ratio q/m. The sample is ionized, the positive ions are accelerated (starting from rest) through a potential difference AV, and they then enter a region of uniform magnetic field. The field bends the ions into circular trajectories, but after just half a circle they either strike the wall or pass through a small opening to a detector. As the accelerating voltage is slowly increased, different ions reach the detector and are measured. Consider a mass spectrometer with a 200.00 mT magnetic field and an 8.0000 cm spacing To five significant figures, what accelerating potential difference AV is required to detect the ion O, ? The masses of the atoms are shown in the table; the mass of the missing electron is less than 0.001 u and is not relevant at this level of precision. Use the following constants: 1 u = 1.6605 × 10' e = 1.6022 × 10-19 C. -27 kg, Atomic masses between the entrance and exit holes. 12 C 12.000 u 14N 14.003 u 160 15.995 u Figure Express your answer to five significant figures and include the appropriate units. 1 of 1 • View Available Hint(s) AV

Part A (Figure 1) shows a mass spectrometer, an analytical instrument used to identify the various molecules in a sample by measuring their charge-to-mass ratio q/m. The sample is ionized, the positive ions are accelerated (starting from rest) through a potential difference AV, and they then enter a region of uniform magnetic field. The field bends the ions into circular trajectories, but after just half a circle they either strike the wall or pass through a small opening to a detector. As the accelerating voltage is slowly increased, different ions reach the detector and are measured. Consider a mass spectrometer with a 200.00 mT magnetic field and an 8.0000 cm spacing To five significant figures, what accelerating potential difference AV is required to detect the ion O, ? The masses of the atoms are shown in the table; the mass of the missing electron is less than 0.001 u and is not relevant at this level of precision. Use the following constants: 1 u = 1.6605 × 10' e = 1.6022 × 10-19 C. -27 kg, Atomic masses between the entrance and exit holes. 12 C 12.000 u 14N 14.003 u 160 15.995 u Figure Express your answer to five significant figures and include the appropriate units. 1 of 1 • View Available Hint(s) AV

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter11: Magnetic Forces And Fields

Section: Chapter Questions

Problem 28P: An electron in a TV CRT moves with a speed of 6.0107 m/s, in a direction perpendicular to Earth's...

See similar textbooks

Similar questions

An electron in a TV CRT moves with a speed of 6.0107 m/s, in a direction perpendicular to Earth's field, which has a strength of 5.0105 T. (a) What strength electric field must be applied perpendicular to the Earth’s field to make the election moves in a straight line? (b) If this is done between plates separated by 1.00 cm, what is the voltage applied? (Note that TVs are usually surrounded by a ferromagnetic material to shield against external magnetic fields and avoid the need for such a collection,)
A particle moving downward at a speed of 6.0106 m/s enters a uniform magnetic field that is horizontal and directed from east to west. (a) If the particle is deflected initially to the north in a circular arc, is its charge positive or negative? (b) If B = 0.25 T and the charge-to-mass ratio (q/m) of the particle is 40107 C/kg. what is ±e radius at the path? (c) What is the speed of the particle after c has moved in the field for 1.0105s ? for 2.0s?
At a particular instant an electron is traveling west to east with a kinetic energy of 10 keV. Earth's magnetic field has a horizontal component of 1.8105 T north and a vertical component of 5.0105 T down. (a) What is the path of the election? (b) What is the radius of curvature of the path?
(a) A cosmic ray proton moving toward Earth at 5.00107 m/s experiences a magnetic force of 1.70l0l6 N. What is the strength of the magnetic field if there is a 45 angle between it and the proton’s velocity? (b) Is the value obtained in part a. consistent with the known strength of Earth's magnetic field on its surface? Discuss.
A strip of copper is placed in a uniform magnetic field of magnitude 2.5 T. The Hall electric field is measured to be 1.5103V/m (a) What is the drift speed of the conduction electrons? (b) Assuming that n =8.01028 elections per cubic meter and that the cross-sectional area of the strip is 5.0106m2 , calculate the current in the ship, (c) What is the Hall coefficient 1/nq?
A proton finds itself doing inform circular motion of 1.2 cm rudius due to a uniform 4.5 tesla magnetic field perpendicular to the plane of the circle. a. at what uniform speed is the proton moving? b. what is the frequancy of its cyclotron motion, in hertz?
Consider a uniform magnetic field of magnitude 0.2 T which is directed along the direction of the positive x axis. A positron, which was accelerated by a potential difference of 1 kV, enters this region of the magnetic field with a velocity v which forms an angle of 85 with the x axis. For this case in which the path that the positron describes is helical, as shown in Figure 1, determine:a) The radius r of the helical path.b) The pitch p of the helical path.
What is the speed of a positive 5.0 mC charge movingperpendicular to a 1.2 T magnetic field such that amagnetic force of 24.0 mN is acting on it? (b) If theB-field is directed into the page and the magnetic force isdirected to the left, what is the direction of the charge’svelocity?
Part A through D Please, and thank you A -4.60μC charge is moving at a constant speed of 6.80×10^5m/s in the +x−direction relative to a reference frame. At the instant when the point charge is at the origin, what is the magnetic-field vector it produces at the following points. Find Bx, By, Bz for each part. Part A x=0.500m, y=0, z=0 Part B x=0, y=0.500m, z=0 Part C x=0.500m, y=0.500m, z=0 Part D x=0, y=0, z=0.500m
A electron is projected horizontally with speed 2.00 x 103 m/s inside a verticallydownward directed uniform magnetic field of field strength 2.50 T. (a) Looking fromthe above describe if the motion of the proton is clockwise or counterclockwise.(b) What is the radius of the circular path? (c) What is the time period of the circularmotion?
An alpha particle (consisting of two protons and two neutrons), traveling at a speed of v = 1.7 x 105 m/s, enters a region of constant magnetic field of strength B = 1.4 T as shown in the figure. The direction of B is out of the image. The alpha follows a path that is a circular arc of radius r. Part (a) In atomic mass units, what is the mass m of an alpha particle? Part (b) In units of elementary charge e, what is the electric charge q of an alpha particle? Part (c) In meters, what is the radius of curvature r of the path taken by the alpha particle?
A long cylindrical conductor of radius R carries a current I as shown below left. The current density J, however, is not uniform over the cross section of the conductor but is a function of the radius according to J = br, where b is a constant. Find an expression for the magnetic field B (a) at a distance r1 < R and (b) at a distance r2 > R, measured from the axis.