9.21. In the Bohr model of the atom an electron circles the nucleus with radius r, speed v, and angular momentum L = mvr = h/2л, where h is Planck's constant. Find the magnetic moment in SI units. As a simple model of a ferromagnetic domain, assume the atomic moments (with the value just calculated) are aligned and located at the vertices of a cubic lattice with lattice spacing 3 Angstroms. Calculate the magnetization.
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- A 93.0 A current circulates around a 2.30-mm-diameter superconducting ring. Y Part A What is the ring's magnetic dipole moment? Express your answer in amperes times meter squared. ▸ View Available Hint(s) JAM Submit Part B 195] ΑΣΦΑ R What is the on-axis magnetic field strength 5.90 cm from the ring? Express your answer with the appropriate units. View Available Hint(s) Valua ? Unite A-mA 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.A charge q = 54 C is located at (9, 8) and we want to find the electric field at pint p (3, 5). Find the source to point vector. Use the following constants if necessary. Coulomb constant, k = 8.987 × 10° N · m² /C² . Vacuum permitivity, €o = 8.854 × 10-12 F/m. Magnetic Permeability of vacuum, µo = 12.566370614356 ×x 10-7 H/m. Magnitude of the Charge of one electron, e = -1.60217662 × 10¬19 C. Mass of one 9.10938356 x 10-31 kg. Unless specified otherwise, each symbol carries their usual meaning. For example, µC means micro coulomb electron, me x component of the vector Give your answer up to at least three significance digits. y component of the vector Give your answer up to at least three significance digits.
- In the upper half space, which is the empty space, I = 7 A current flows from the infinitely long wire along the y axis that intersects the z axis at the point C (0,0,10). Half-space z <0 is from a material with relative magnetic permeability µr = 5. Write numerically the sum of the components (Hx + Hy + Hz) at the point A (-5, -5,0 +) of the magnetic field H [A / m] vector in terms of the given magnitudes (in the half space z> 0).In the upper half space, which is the empty space, I = 7 A current flows from the infinitely long wire along the y axis that intersects the z axis at the point C (0,0,10). Half-space z <0 is from a material with relative magnetic permeability µr = 5. 1. Write numerically the sum of the components (Hx + Hy + Hz) at the point A (-5, -5,0 +) of the magnetic field H [A / m] vector in terms of the given magnitudes (in the half space z> 0). 2.Write numerically the sum of the components (Hx + Hy + Hz) at the point A (-2, -4,0-) of the vector magnetic field H⃗[A / m] in terms of the given magnitudes (in the half-space z <0).A cepper wee tat asiular er sectian wth a radius of 4.60 mm () the wire oaties arent of 360 A find the dit speed of the eiectrons in the wire. (The density of electrons in copper is n-8.46 10 electrons/m) 61414 Your response affers from the comect answer by more than 10. Double check your calculations, m/s D) Ather things being equal what happens ta the drift speed in wires made of metal having a larger number of conduction electrons per atom than copper? Explain. The vety wt deoa
- A 99.0 A current circulates around a 2.50-mm-diameter superconducting ring. What is the ring's magnetic dipole moment? Express your answer in amperes times meter squared. ► View Available Hint(s) μ = Submit Part B ΠΫΠΙ ΑΣΦ B = What is the on-axis magnetic field strength 6.00 cm from the ring? Express your answer with the appropriate units. ► View Available Hint(s) μÅ Value Units ? ? A.m² ReviewA large sheet of charge has a surface charge density of 1.9 µC/m?. Randomized Variables o = 1.9 µC/m? Enter the value, in newtons per coulomb, of the electric field magnitude just above the sheet, far from the edges. E = a(D7 89 E 4 sin() cos() tan() HOME cotan() asin() acos() 5 atan() acotan() sinh() 1 2 3 cosh() tanh() cotanh() END O Degrees O Radians VOL BACKSPACE CLEAR Submit Hint Feedback I give up!(1.3) The complex dielectric constant of the semicon- 8.92 + ductor cadmium telluride is given by er i 2.29 at 500 nm. Calculate for CdTe at this wave- length: the phase velocity of light, the absorption coefficient and the reflectivity. (1.4) The detectors used in optical fibre networks op- erating at 850 nm are usually made from silicon, which has an absorption coefficient of 1.3×105 m¯¹ at this wavelength. The detectors have coatings on the front surface that makes the reflectivity at the design wavelength negligibly small. Calculate the thickness of the active region of a photodiode de- signed to absorb 90% of the light.
- Write continuity equation for charge in its differential form. What’s the underlying physical law? Integrate the continuity equation for a pile of 10^23 electrons, from which, on average, 10^5 fly away from the pile with velocity 100m/s. Calculate I in SI.A piezoelectric crystal is characterized by a constant, 12 × 10-13 (V/m)/ (N/m2). The diameter of crystal is 8 mm, thickness is 2 mm and leakageresistance is 108 Ω.[1]. Determine the sensitivity of crystal for measurement of displacement inV/m?[2]. Also what will be the output voltage for an input force of 10 N?[3]. If above crystal is connected to an amplifier with input capacitance of 4× 10-10 F and resistance of 108 Ω. The connecting cable has a capacitance of2 × 10-10 F. Determine the time constant for measurement of displacement.[Dielectric constant = 1.250 × 10-8 F/m and Young’s modulus of 1.2 × 10-11 N/m2]. ( Please answer all parts)Let the figure (Figure 1) represent a strip of an unknown metal with z1z1=11.8 mmmm and y1y1=0.23 mmmm. When the magnetic field is 2.29 TT and the current is 78.0 AA, the Hall emf is found to be 131 μVμV. What does the simplified model of the Hall effect give for the density of free electrons in the unknown metal?