D3.2. Calculate D in rectangular coordinates at point P(2, –3, 6) produced by: (a) a point charge QA charge PLB 55 mC at Q(-2, 3, –6); (b) a uniform line 20 mC/m on the x axis; (c) a uniform surface charge density Psc 120 µC/m² on the plane z = –5 m.

Q: A charged semicircular ring of radius a extending from φ = π to φ = 2π lies in the xy plane and is…

A: Electric field is always pointing away from positive charge and has a magnitude-   E = 1/4π€°(Q1/r²)…

Q: A small particle with mass m=1 mg and positive charge Q=1 ?C is placed just near the ground. What…

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Q: A thin, flat ring with inner radius R1 and outer radius R2 is uniformly charged on one side with a…

A: R2 = 0.23 mh = 0.15 m

Q: Long line is carrying a uniform charge density λ=9μC/m that is 20.0 cm above a large surface with…

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Q: A cylindrical and long charge distribution has been described by the charge density function shown…

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Q: This problem checks that you can use the formula that gives the electric field due to a spherical…

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Q: b) The following are the two Maxwell equations related to electrostatic ав V.Ď=p₁; VxĒ=-=0 ôt i)…

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Q: (1) In this problem, we will calculate the electric field of a line charge. The line charge is…

A: Given data, Length of the line charge = L Co-ordinates of point P = (d,0) Line charge density = λ

Q: In the figure a small circular hole of radius R= 1.92 cm has been cut in the middle of an infinite,…

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Q: Let Be(R) be a ball of radius R with surface charge density of o(0, 4) = A cos? p. Show that the…

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Q: Suppose there are four stationary point charges in space, each with a charge of 0.0009 C. The…

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Q: You measure the excess charge on a hollow conductor (shown right) to be -5.5 μC, and a 3.5-μC point…

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Q: ) Find the electric field on the z axis (0,0,z) produced by an annular() ring of uniform surface…

A: (a) Let the inner radius of the annular ring be a and the outer radius of the ring be b.  The…

Q: nsider a square that is 1.0m on a side. Charges are placed at the corners of the square a ows: +4.0…

A: Electric field due to piont charge  E =kq /r2  If two or more than two electric field acts at a…

Q: A uniformly charged disk with radius R = 25.0 cm and uniform charge density = 6.20 x 10-³ C/m² lies…

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Q: A disk of radius R = 6.51 cm is centered at the origin and lies in the y-z plane. The disk has a…

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Ising model of Ferromagnets

The Ising model is one of the easiest and most famous theoretical models for ferromagnetism in statistical mechanics. When a group of atomic spins aligns such that their magnetic moments are pointed in the same direction and produce a strong permanent magnetic moment in macroscopic size, the phenomenon is called ferromagnetism. The relative permeability of these magnets is greater than unity and increasing magnetization with the applied external field. Even in the absence of an external magnetic field, these substances retain spontaneous magnetization. An example of ferromagnets is iron.