Concept explainers
DATA You are a technician testing the operation of a cyclotron. An alpha particle in the device moves in a circular path in a magnetic field
Figure F27.80
Want to see the full answer?
Check out a sample textbook solutionChapter 27 Solutions
University Physics with Modern Physics (14th Edition)
Additional Science Textbook Solutions
College Physics
Physics for Scientists and Engineers with Modern Physics
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)
University Physics Volume 1
Essential University Physics: Volume 2 (3rd Edition)
Essential University Physics (3rd Edition)
- A proton precesses with a frequency p in the presence of a magnetic field. If the intensity of the magnetic field is doubled, what happens to the precessional frequency?arrow_forwardMagnetic resonance imaging (MRI) is a powerful method that, unlike X-ray imaging, allows sharp images of soft tissue to be taken without exposing the patient to potentially dangerous radiation. The starting point for MRI is nuclear magnetic resonance (NMR), a technique that depends on whether the protons in the atomic nucleus have a magnetic field. The origin of the proton's magnetic field is its spin. In a classical analogy, the proton has a magnetic moment μ⃗ , like a loop of wire; thus, it will have a torque when subjected to an external magnetic field B⃗ 0. The magnitude of μ⃗ is somewhere around 1.4×10−26 J/T. The proton can be thought of as being in one of two states: either oriented parallel or antiparallel to the applied magnetic field, with work being done to invert the proton from the low-energy to the high-energy state. If a nucleus has an even number of protons and neutrons, they will pair up in such a way that half of the protons will have spins in one orientation, and…arrow_forwardThe operator of a mass spectrometer produces a beam of doubly ionized (2+) ions. They first are accelerated by a potential difference of 34 V. Then, as the ions pass through a magnetic field of 0.050 T, the radius of their path is 53 mm. a) Determine the charge to mass ratio of this ion. b) Using your periodic table determine the most likely element this ion would be. Remember to note the name of the element and its mass number (e.g. carbon-12) (Note that the average NUCLEON (proton or neutron) has a mass of 1.67 x 10-27 kg.)arrow_forward
- OResources A Give Up? 3.6% A beam of protons is directed in a straight line along the positive z-direction through a region of space in which there are crossed electric and magnetic fields. If the electric field magnitude is E = 430 V/m in the negative y-direction and the protons move at a constant speed of v = 8.7 x 10° m/s, what must the direction and magnitude of the magnetic field be in order for the beam of protons to continue undeflected along its straight-line trajectory? Select the direction of the magnetic field B. O positive y-direction O positive x-direction negative z-direction O negative y-direction O positive z-direction O negative x-direction magnitude of the magnetic field B: about us careers privacy policy terms of use contact us help 87°F Rain coming PrtScn F8 Home End F10 PgUp F11 PgDn F12 F3 F4 ES F6 F7 F9 8. %3D T. Y U * CO %24 14arrow_forwardA common way to focus a beam of charged particles is to use an electric field and a magnetic field together. Based on the relative strength and orientation of the two fields, you can tune the Coulomb and Lorentz forces to direct the beam of particles. This technique is common in mass spectrometers and scanning electron microscopes. You want to focus a beam of positively charged particles moving in the -z direction. The particles have a mass of 3.30e-23 kg and you orient a 0.341 T magnetic field in the +x direction. What direction do the particles feel the Lorentz force from the magnetic field? The particle is moving with a velocity of 1.97e+05 and has a charge of 1.00e-16 C. What is the magnitude of the Lorentz force on the particle S in Newton? FLorentz %D If you want the Lorentz force and the Coulomb force to exactly cancel each other, what magnitude of electric field should you apply in N E = What direction should you orient the electric field so that the Coulomb force and the…arrow_forwardAn alpha particle with velocity v = (3 x 105,0,0) m/s enters a region where the magnetic field has a value B = (0,0,1.2) T. Determine the required magnitude and direction of an electric field E that will allow the alpha particle to continue to move along the x axis.arrow_forward
- A common way to focus a beam of charged particles is to use an electric field and a magnetic field together. Based on the relative strength and orientation of the two fields, you can tune the Coulomb and Lorentz forces to direct the beam of particles. This technique is common in mass spectrometers and scanning electron microscopes. You want to focus a beam of positively charged particles moving in the -z direction. The particles have a mass of 1.50e-22 kg and you orient a 0.316 T magnetic field in the -x direction. What direction do the particles feel the Lorentz force from the magnetic field? The particle is moving with a velocity of 4.63e+05m and has a charge of 2.36e-16 C. What is the magnitude of the Lorentz force on the particle in Newton? FLorentz N = E = If you want the Lorentz force and the Coulomb force to exactly cancel each other, what magnitude of electric field should you apply in S C What direction should you orient the electric field so that the Coulomb force and the…arrow_forwardSolve the following: A proton (of mass, m=1.67 x 10-27kg) starts moving in a circular path of radius 4 cm when it enters perpendicular to the Earth's magnetic field of 4 x 10-5 T. B in Calculate the speed of the cosmic ray proton in (m/s) ?arrow_forwardA proton, a deuteron and and particle having same kinetic energy are moving in circular trajectories in a constant magnetic field. If rp,rd and ra denote respectively the radii of trajectories of these particles, then,arrow_forward
- A nucleus with 18 protons travels at a velocity of 6.37 x 10^6 m/s through a region of uniform magnetic field strength 3.35 T. The nucleus experiences a magnetic force of 3.13E-11 N. What angle does the nucleus s velocity vector make with respect to the magnetic field direction? 6.1 degrees 24.5 degrees 36.7 degrees 30.6 degreesarrow_forwardAn alpha particle (m = 6.68 x 1027 kg, q = +2 e.c.) is fired through a velocity selector that is created by an electric field of 4.5 x 105 N/C and a magnetic field of 0.90 T. It then enters a second magnetic field of 1.5 T. a) Explain how a velocity selector works and determine the speed which the alpha particle must have been moving at. b) After half a revolution in the second magnetic field, the alpha particle exits the field. How far from its point of entry does it leave?arrow_forwardA nucleus with 30 protons travels at a velocity of 1.43 x 10^6 m/s through a region of uniform magnetic field strength 3.96 T. The nucleus experiences a magnetic force of 1.01E-11 N. What angle does the nucleus s velocity vector make with respect to the magnetic field direction?Question 1 options: 21.8 degrees 4.4 degrees 19.6 degrees 32.7 degreesQuestion 2 (5 points) A particle with charge 5.32 x 10^-6 C moves at 7.25 x 10^6 m/s through a magnetic field of strength 3.85 T. The angle between the particle s velocity and the magnetic field direction is 38.0 degrees and the particle undergoes an acceleration of 5.4 m/s^2. What is the particle s mass?Question 2 options: 7.0 kg 16.93 kg 1.1 kg 3.2 kgQuestion 3 (5 points) See the attached figure for this problem. A charge of 5.30 x 10^6 C moves to the right as shown through a region containing both a magnetic field of strength 3.91 T directed into the screen and an electric field of strength 2.79 x 10^5 N/C directed downward. The charge…arrow_forward
- Glencoe Physics: Principles and Problems, Student...PhysicsISBN:9780078807213Author:Paul W. ZitzewitzPublisher:Glencoe/McGraw-HillModern PhysicsPhysicsISBN:9781111794378Author:Raymond A. Serway, Clement J. Moses, Curt A. MoyerPublisher:Cengage Learning