Fundamentals of Physics, Binder Ready Version
10th Edition
ISBN: 9781118230640
Author: Halliday, David; Resnick, Robert; Walker, Jearl
Publisher: WILEY
expand_more
expand_more
format_list_bulleted
Question
Chapter 39, Problem 7Q
To determine
To find:
The factor you need to change to trap a positron in an idealized trap of figure 39.1.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
to
Radiation
V
Free
electron
Counter
Figure 2:
3. The radial e lectric field for the Geiger counter[see figure 2] is approximately given by E =
[use Gauss' Law for infinitely long
2περτ
concentric conducting cylinders of inner radius a and outer radius b] .
(a)The potential of the inner cylinder with respect to the outer cylinder and the electric field follow as:
2TEO
V
b
V
1
V = Va – V½ = | Ē
. dr =
dr
2T€or
In
2TE0
* E =
ln
(True, False)
%3D
In
b
а
a
a
(b) Assume the electric field is E =
V
1
b r
145µm , b = 1.8cm . If the radial electric field at a distance of 1.2cm from the axis of
and a =
ln
a
the wire is 2 × 10ªV/m The potential difference between the wire and the cylinder is 1060 Volts
(True,False).
A hydrogen atom (with the Bohr radius of half an angstrom) is situated between two metal plates 1 mm apart, which are connected to opposite terminals of a 500 V battery. What fraction of the atomic radius does the separation distance d amount to, roughly? Estimate the voltage you would need with this apparatus to ionize the atom.
The electric field due to an unknown charge distribution is given by E = exp(-4r)f
The total integrated charge over all space [pdV is given by
[IISC. 2009]
(a) 0
(b) q
(c)'q/4.
(d) q/n
Chapter 39 Solutions
Fundamentals of Physics, Binder Ready Version
Ch. 39 - Prob. 1QCh. 39 - Prob. 2QCh. 39 - Prob. 3QCh. 39 - Prob. 4QCh. 39 - Prob. 5QCh. 39 - Prob. 6QCh. 39 - Prob. 7QCh. 39 - Prob. 8QCh. 39 - Prob. 9QCh. 39 - Prob. 10Q
Ch. 39 - Prob. 11QCh. 39 - Prob. 12QCh. 39 - Prob. 13QCh. 39 - Prob. 14QCh. 39 - Prob. 15QCh. 39 - Prob. 1PCh. 39 - Prob. 2PCh. 39 - Prob. 3PCh. 39 - Prob. 4PCh. 39 - Prob. 5PCh. 39 - Prob. 6PCh. 39 - Prob. 7PCh. 39 - Prob. 8PCh. 39 - Prob. 9PCh. 39 - Prob. 10PCh. 39 - Prob. 11PCh. 39 - Prob. 12PCh. 39 - Prob. 13PCh. 39 - Prob. 14PCh. 39 - Prob. 15PCh. 39 - Prob. 16PCh. 39 - Prob. 17PCh. 39 - Prob. 18PCh. 39 - Prob. 19PCh. 39 - Prob. 20PCh. 39 - Prob. 21PCh. 39 - Prob. 22PCh. 39 - Prob. 23PCh. 39 - Prob. 24PCh. 39 - Prob. 25PCh. 39 - Prob. 26PCh. 39 - Prob. 27PCh. 39 - Prob. 28PCh. 39 - Prob. 29PCh. 39 - Prob. 30PCh. 39 - Prob. 31PCh. 39 - Prob. 32PCh. 39 - Prob. 33PCh. 39 - Prob. 34PCh. 39 - Prob. 35PCh. 39 - Prob. 36PCh. 39 - Prob. 37PCh. 39 - Prob. 38PCh. 39 - Prob. 39PCh. 39 - Prob. 40PCh. 39 - Prob. 41PCh. 39 - Prob. 42PCh. 39 - Prob. 43PCh. 39 - Prob. 44PCh. 39 - Prob. 45PCh. 39 - Prob. 46PCh. 39 - Prob. 47PCh. 39 - Prob. 48PCh. 39 - Prob. 49PCh. 39 - Prob. 50PCh. 39 - Prob. 51PCh. 39 - Prob. 52PCh. 39 - Prob. 53PCh. 39 - Prob. 54PCh. 39 - Prob. 55PCh. 39 - Prob. 56PCh. 39 - Prob. 57PCh. 39 - Prob. 58PCh. 39 - Prob. 59PCh. 39 - Prob. 60PCh. 39 - Prob. 61PCh. 39 - Prob. 62PCh. 39 - Prob. 63PCh. 39 - Prob. 64PCh. 39 - A diatomic gas molcculc consistsof two atoms of...Ch. 39 - Prob. 66PCh. 39 - Prob. 67PCh. 39 - Prob. 68PCh. 39 - Prob. 69PCh. 39 - Prob. 70PCh. 39 - An old model of a hydrogen atom has the charge e...Ch. 39 - Prob. 72PCh. 39 - Prob. 73P
Knowledge Booster
Similar questions
- Consider a degenerate electron gas in which essentially all of theelectrons are highly relativistic (€ » mc2 ), so that their energies are € pc (where p is the magnitude of the momentum vector).(a) Modify the derivation given above to show that for a relativistic electron gas at zero temperature, the chemical potential (or Fermi energy) is given by μ = hc(3N/87πV)1/3.(b) Find a formula for the total energy of this system in terms of Nand μarrow_forwardConsider a system of N free electrons within a volume V. Even at absolute zero, such a system exerts a pressure P on its surroundings due to the motion of the electrons. To calculate this pressure, imagine that the volume increases by a small amount dV. The electrons will do an amount of work PdV on their surroundings, which means that the total energy Erot of the electrons will change by an amount dEtot = -PdV. Hence P = -dErot/dV. a) Show that the pressure of the electrons at absolute zero is 2 N P ==EFo, where Ero denotes the Fermi energy at absolute zero. b) Calculate Efo and P for solid copper, which has a free-electron concentration of 8.45 x 1028 m-3. Express Ero and P in electronvolts and atmospheres, respectively. c) The pressure you found in part (b) is extremely high. Why, then, don't the electrons in a piece of copper simply explode out of the metal?arrow_forwardIn a Milkman oil drop experiment, an oil drop of mass 4.90×10−15 kg is balanced and held stationary by the electric field between two parallel plates. If the potential difference between two plates is 750 V and spacing between them is 5.0 mm, calculate the charge on the droplet. Assuming g= 9.8 m/s2.arrow_forward
- QI) given a line charge distribution of where A(3 , π2,1) and B(4, π, 6) . 10 -12 C/m) on z axis, find VABarrow_forward(VI.1) (a) Find the fields, and the charge and current distributions, corresponding to qct V (7, t) = 0, Ä(7, t) = r2 (b) Use the following gauge function to transform the above potentials and comment on the results. qct (c) Which of the potentials in (a) and (b) are in the Coulomb gauge? Note: use spherical coordinates, and apply the correct expression to calculate the deriva- tives with the del operator (V).arrow_forwardA hole is the absence of an electron at a potential location for its existence. Given that a hole is the result of the absence of an electron, its mass should be zero. However, we regard the effective mass of a hole to be negative. Why?arrow_forward
- In a parallel-plate diode, the anode is at 250 V with respect to the cathode which is 4 mm away from it . An electron is emitted from cathode with an initial yelocity towards cathode of 2×102 m/s. calculate : 1/ the arrival velovity of electron at andode ? 2/ time of transit?arrow_forwardb) Find E at (0,4,0) P, = 2 mC 2 (0 4, 0)arrow_forwardThe population ratio between two energy levels ni nj separated in energy by: A E = E₁ - Ej with AE = 1.1×10-22 J is 0.84. That is: ni = 0.84 with AE = 1.1×10-22] nj Remember the Boltzmann equation for the population of particles in state i with energy Ei at temperature T is: N n₁ = = e Z What is the temperature of the system (use two sig figs)? 4.0 ✓ Karrow_forward
- You are performing work as an assistant to a cosmology professor. She asks you to estimate the temperature of the Universe at a time after the Big Bang when neutral atoms could form from the plasma and the Universe became transparent. She tells you that the energy required to excite an atom is on the order of 1 eV. She suggests you use the Boltzmann distribution function e-E/k BT to find the order of magnitude of the threshold temperature at which 1.00% of a population of photons has energy greater than 1.00 eV.arrow_forwardConsider a proton confined within typical nuclear dimensions of 5×10^(−15) m. Estimate the minimum kinetic energy of the proton. Repeat this calculation for an electron confined within typical nuclear dimensions. Comment briefly on the physical significance of your results, given that the nuclear binding energy for a proton is typically in the range 1−10 MeVarrow_forwardProtons of energy 5.7 MeV are incident on a gold foil of thickness 4.4 x 10-6 m. What fraction of the incident protons is scattered at the following angles? (The density of gold is 19.3 g/cm³, and its molar mass is 197.0 g/mol. Give your answer in decimal notation, e.g., 0.05 for 1/20.) (a) greater than 90° (b) less than 5⁰arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Modern PhysicsPhysicsISBN:9781111794378Author:Raymond A. Serway, Clement J. Moses, Curt A. MoyerPublisher:Cengage Learning
Modern Physics
Physics
ISBN:9781111794378
Author:Raymond A. Serway, Clement J. Moses, Curt A. Moyer
Publisher:Cengage Learning