A thin dielectric disk with radius a has a total charge +Q distributed uniformly over its surface (Figure 1). It rotates n timesper second about an axis perpendicular to the surface of the disk and passing through its center. Find the magnetic fieldat the center of the disk. What magnetic field does this ring produce at the center of the disk?Express your answer in terms of the variables Q, a, r, dr, n, and the constant and µ0, if needed.Dielectric disk.radius a.charge +QRing, inner radius r.outer radius r + drn rotationsper secondaBat centerof disk?

Given Data: The total charge on the sphere is .The frequency of the ring is To Find: Magnetic field…

Answered: A thin dielectric disk with radius a…

Similar questions

If two magnetic field vectors H, and H2 are moving along the same axis in free space, write all the possible base vectors.
A wire with resistivity ρ (resistance per unit length) is bended in a way to form a shape like bb-8 in the movie Star Wars. (See the figure on the right.) We can approximate it as two circles of radius R and 2R lying in the same plane. Note the wire has an insulating shell, and it crosses over itself at joint of the two circles. The wire is then placed in a magnetic field that is spatially uniform, but increases its magnitude over time with B = bt, where b is a constant of appropriate dimension. (a) What is the total resistance of the wire? Express your answer in terms of ρ and R. (b) What is the emf induced in the upper circle? In which direction? Express your answer in terms of R and b. (c) What is the emf induced in the lower circle? In which direction? Express your answer with R and b. (d) Find the net induced current flowing in the wire. Also specify the direction of the induced current. (It is better to indicate the direction by drawing arrows on the figure…
Given the attached info: A. As it passes the origin, what are the strength and direction of the magnetic field at the (1 cm, 0 cm, 0 cm) position? Give your answer using unit vectors. B. As it passes the origin, what are the strength and direction of the magnetic field at the (0 cm, 1 cm, 0 cm) position? Give your answer using unit vectors. C. As it passes the origin, what are the strength and direction of the magnetic field at the (0 cm, -2 cm, 0 cm) position? Give your answer using unit vectors.
help
For a research project, a student needs a solenoid that produces an interior magnetic field of 0.0500 T. She decides to use a current of 1.00 A and a wire 0.500 mm in diameter. She winds the solenoid in layers on an insulating form 1.00 cm in diameter and 11.0 cm long.A) Determine the number of layers of wire needed. (Round your answer up to the nearest integer.) _____ layers B) Determine the total length of the wire. (Use the integer number of layers and the average layer diameter.) _____ m
A straight, vertical wire carries a current of 2.15 A downward in a region between the poles of a large superconducting electromagnet, where the magnetic field has a magnitude of B = 0.554 T and is horizontal. What is the magnitude of the magnetic force on a 1.00 cm section of the wire that is in this uniform magnetic field, if the magnetic field direction is east? Express your answer with the appropriate units. F = Submit Part B Value north H west east μÅ What is the direction of this magnetic force? south Request Answer Units wwwww. ?
A particle with unit charge (q = 1) enters a constant magnetic field B = i + j with velocity v = 21k. Find the magnitude and direction of the force on the particle. Make a sketch of the magnetic field, the velocity, and the force. What is the magnitude of the force on the particle? 21√√2 (Type an exact answer, using radicals as needed.) What is the direction of the force on the particle? Select the correct choice below and fill in the answer box to complete your choice. A. The force is applied at a(n) B. The force is applied at a(n) O c. The force is applied at a(n) angle with the positive x-axis in the xz-plane. angle with the positive x-axis in the xy-plane. angle with the positive y-axis in the yz-plane.
A long, horizontal wire is carrying a current I. A particle of mass m and charge q is fired horizontally at a speed v0. The initial velocity of the particle is parallel to the wire, and its initial position is a distance r directly below the wire, as shown in (Figure 1). What initial speed must the particle have for it to travel in a straight line? Do not ignore gravity. Express your answer in terms of I, m, q, r, µo, and the acceleration of gravity g. Part I Determine at what initial speed vo the particle will travel in a straight horizontal line. Express your answer in terms of some, all, or none of the variables m, q, vo, I, r, and the constants 9, Ho, and T. ► View Available Hint(s) v0 = VE ΑΣΦ Review | Constants ?
In the figure, point P2 is at perpendicular distance R = 29.5 cm from one end of straight wire of length L = 13.4 cm carrying current i= 0.783 A. (Note that the wire is not long.) What is the magnitude of the magnetic field at P2? Po R I. Number i Units
An electron moves along the z-axis with v₂ = 4.7 x 107 m/s. As it passes the origin, what are the strength and direction of the magnetic field at the following (x, y, z) positions? Part A (1 cm, 0 cm, 0 cm) Express your answers using two significant figures.Enter your answers numerically separated by commas. Br, By, B₂ = Submit Part B VE ΑΣΦ Request Answer Ba, By, B₂ = Submit (0 cm, 0 cm, 1 cm) Express your answers using two significant figures. Enter your answers numerically separated by commas. IVE| ΑΣΦ ? Request Answer T ? T
A long, cylindrical conductor of radius R carries a current I as shown in the figure below. The current density J, however, is not uniform over the cross section of the conductor but is a function of the radius according to J = 4br2, where b is a constant. Find an expression for the magnetic field magnitude B at the following distances, measured from the axis in part a and b. (Use the following variables as necessary: ?0, r1, r2, b, R.) Note: See image for the original question and figure
E A charge of 1.1 C having an initial velocity of 3.91+4.1k m/s enters a region with an electric field E=3.4k N/C and a magnetic field B=4.27+3.9k T. Calculate the magnitude of the force on the charge immediately after it enters the region. Express your answer in Newtons (write just the value, not the unit), rounding to one digit after the decimal separator. Yanitinizi ekleyin.

SEE MORE QUESTIONS