E=[q/(4πε0R3)]rDIPOLEE=ρ/ (4πε0z3) Equatorial(Perp. Bisect)Axial (Line connecting)In a certain cyclotron a proton moves in a circle of radius 0.500 m. The magnitude of the magnetic field is 1.20 T.The bent wire shown in Fig. 28-39 lies in a uniform magnetic field. Each straight section is 1.8 m long and makes an angle of = 30° with the xaxis, and the wire carries a current of 2.0 A. a) B= 4k b) B= 4itAn electron has an initial velocity of (12.0 j+ 15.0 k) km/s and a constant acceleration of (2.00 1012m/s2) iin a region in which uniform electric and magnetic fields are present. If B= (400 µT) i, find the electric field E..The magnetic dipole moment of Earth is 8 1022J/T. Assume that this is produced by charges flowing in Earth's molten outer core. If the radius of their circular path is 3500 km, calculate the current they produce.The magnitude J(r) of the current density in a certain cylindrical wire is given as a function of radial distance from the center of the wire's cross section as J(r) = Br, where ris in meters, J
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