Concept explainers
Review. In an electron microscope, there is an electron gun that contains two charged metallic plates 2.80 cm apart. An electric force accelerates each electron in the beam from rest to 9.60% of the
Trending nowThis is a popular solution!
Chapter 7 Solutions
PHYSICS FOR SCI.AND ENGR W/WEBASSIGN
- A Van de Graaff accelerator utilizes a 50.0 MV potential difference to accelerate charged particles such as protons. (a) What is the velocity of a proton accelerated by such a potential? (b) An electron?arrow_forward(a) At what speed will a proton move in a circular path of the same radius as the electron in the previous exercise? (b) What would the radius of the path be if tlie proton had the same speed as the election? (c) What would the radius be if the proton had tlie same kinetic energy' as die electron? (d) The same momentum?arrow_forwardFour charged particles are at rest at the corners of a square (Fig. P26.14). The net charges are q1 = q2 = +2.65 C and q3 = q4 = 5.15 C. The distance between particle 1 and particle 3 is r13 = 1.75 cm. a. What is the electric potential energy of the four-particle system? b. If the particles are released from rest, what will happen to the system? In particular, what will happen to the systems kinetic energy?arrow_forward
- (a) Find the potential difference VB required to stop an electron (called a slopping potential) moving with an initial speed of 2.85 107 m/s. (b) Would a proton traveling at the same speed require a greater or lesser magnitude potential difference? Explain. (c) Find a symbolic expression for the ratio of the proton stopping potential and the electron stopping potential, Vp/Ve. The answer should be in terms of the proton mass mp and electron mass me.arrow_forwardAn electron in an x-ray machine is accelerated through a potential difference of 1.0 × 104 V before it hits the target. What is the kinetic energy of the electron in electron volts?arrow_forwardAn evacuated tube uses an accelerating voltage of 69 kV to accelerate electrons to hit a copper plate and produce X-rays. Non-relativistically, what would be the maximum speed (in m/s) of these electrons?arrow_forward
- An electron (q=−1.602×10−19[C]) moves a distance d=2.50[m] in a linear accelerator under a uniform external electric field of magnitude E→=3.50×10^7[N/C]. What is the energy gained by the electron in electron volts?arrow_forwardA +5.6 C charged particle (m=2.0 kg) is placed 42 cm from a -3.7C stationary charge. If the particle starts from rest, how fast will it moving after it has traveled 24.0 cm. What is the change in potential energy, and what is the speed of the particle?arrow_forwardAn electron is accelerated from rest through a potential difference of 3.00 kV. What is its final velocity? The mass of an electron is 9.109×10-31 kg.arrow_forward
- An electron is to be accelerated in a uniform electric field having a strength of 2.106 (a) What energy in keV is given to the electron if it is accelerated through 0.45 m? AKE = keV m (b) Over what distance (in km) would it have to be accelerated to increase its energy by 45 GeV? d = ✔km Hint: How is potential energy, PE, gained by an electron related to the uniform electric field? How is the potential difference, V, related to the uniform electric field?arrow_forwardThis scanning electron microscope image of a bacterium was produced using a beam of electrons accelerated through an 30 kV potential difference. What is the speed of the electrons?arrow_forwardSome forms of tumors can be treated using proton therapy. The physics idea behind this B. biomedical technique is to design a machine that uses electric fields to accelerate a beam of protons to high velocities. These high speed protons strike the tumor and destroy it by impact. One way to ac- complish this is shown in the figure below where protons leak out with negligible speed from a hot oven. The exit speed of these protons should be 1.0 × 106 m/s in the direction shown. The distance be- tween the oven and plate B is given to be 5.0 m. The charge on a proton is 1.6 x 10-19 C and the mass of a proton is 1.7 x 10-27 kg. plate A plate B Ax = 10 m Oven vg = 1 x 106 m/s Positively charged ions leaking out (a) What must be the potential difference AVAB between the two plates A and B? Please express your final answer with the proper sign using only two significant figures. (b) Many therapies are switching to using carbon ions. A carbon ion is much heavier than a proton but since it is…arrow_forward
- College PhysicsPhysicsISBN:9781285737027Author:Raymond A. Serway, Chris VuillePublisher:Cengage LearningCollege PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage LearningPhysics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning
- Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningCollege PhysicsPhysicsISBN:9781938168000Author:Paul Peter Urone, Roger HinrichsPublisher:OpenStax College