Question
thumb_up100%
Class:
1. The electric potential of some charge configuration is given by the expression
v = (c1 / r) * exp(-c2r)
where c1 and c2 are constants.
a. Show that the volume charge density p associated with this electric potential
is given by
p = E0c1(4 * pi * delta3(r) - (c22e-c2r/r))
where ?3(r) (delta3(r)) is the 3D Dirac-Delta function.
b. Use your result from (a) to determine the total charge Q associated with the
charge distribution.
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution
Trending nowThis is a popular solution!
Step by stepSolved in 3 steps with 3 images
Knowledge Booster
Similar questions
- J. J. Thomson is best known for his discoveries about the nature of cathode rays. His other important contribution was the invention, together with one of his students, of the mass spectrometer, a device that measures the ratio of mass m to (positive) charge q of an ion. The spectrometer consists of two regions as shown in the figure. (Figure 1) In the first region an electric field accelerates the ion and in the second the ion follows a circular arc in a magnetic field. The radius of curvature of the arc can be measured and then the m/q ratio can be Figure V B • Part A Find the ratio m/q for this particle. Express your answer numerically in kilograms per coulomb. View Available Hint(s) After being accelerated to a speed of 1.21x105 m/s, the particle enters a uniform magnetic field of strength 0.700 T and travels in a circle of radius 35.0 cm (determined by observing where it hits the screen as shown in the figure). The results of this experiment allow one to find m/q. m/q= Submit…arrow_forwarda)What is the magnitude of the electric field at a distance of 0.1 nm from a thorium nucleus? b)What is the magnitude of the force on an electron at that distance? c)Treating the electron classically, that is, as a point object that can move around the nucleus at reasonably slow speeds, what is the frequency of the electron's motion? d)Again treating the electron classically, how fast it it moving? e)What would the magnitude of the force be if the distance of the electron from the nucleus were doubled?arrow_forwardelectromagnetisma The polarization vector in a dielectric tube of inner radius r; and outer radius r. is P = Po(a, 2x + ây3y). The axis of the dielectric tube defined by zoz20 coincides with the z-axis. a) Determine the equivalent polarization surface and volume charge densitites. b) Show that the total bound charge is zero.arrow_forward
- An electron with kinetic energy ? is traveling along the positive ?-axis, which is along the axis of a cathode‑ray tube, as shown in the figure. There is an electric field ?=14.0×104 N/C pointed in the positive ?-direction between the deflection plates, which are 0.0600 m long and are separated by 0.0200 m. Determine the minimum kinetic energy ?min the electron can have and still avoid colliding with one of the plates.arrow_forwardA uniform electric field is created by two horizontal parallel plate electrodes of length 10 cm separated by a vertical distance d = 5 cm and held at a potential difference V = 250V. A beam of electrons is introduced between the two plates with a horizontal velocity v = 5 x 106 m/s. What is the deflection distance towards the positive plate when the electron beam leaves the electric field? Select one: a. 5.0 cm b. 3.5 cm c. 1.76 cm d. 8.8 mmarrow_forwardy Figure 3: 7= xi+ yj+zk = pcos cos oi + p sin oj + zk = pp+ zk and i = dr dt -p sin oi + p cos oj + k = po + zk . Notice that cyclotron angular velocity we = do COS is a negative constant, i.e. in the figure the particle is circulating clockwise. 3. Consider a charged particle, q, in the presence of a magnetic field B with velocity i = it + üz = ü + ij at position relative to origin experiencing a magnetic force qü x B. From the second law it follows that the kinetic energy of the particle remains constant[ see figure 3] : d mv2 m[v² + v?] du - 0 = dt (a) : qü x B m ä - i [gữ x B] = ū. [m- = constant (True, False) dt 2 (b) : A [B x Č) Č [Ä x B] = B IC x A] (True, False)arrow_forward
arrow_back_ios
arrow_forward_ios