A thin iron ring with mean diameter `d = 50 cm` supports a winding consisting of `N = 800` turns carrying current `I = 3.0A`. The ring has a cross-cut of width `b = 2.0 mm`. Neglecting the scattering of the magnetic flux at the gap edges, and using the plot shown in FIg. find the permeabitliy of iron under these conditions.

A thin iron ring with mean diameter, d=50 cm . supports a winding consisting of 800 turns, with current 3A. The ring has a cross-cut of width 2.0 mm. The permeability of iron is (graph between B and H is given):

An iron core shaped as a tore number of turns mean R = 250 mm . The supports a winding with the total number of turns N = 1000 . The core has a cross-cut of width b = 1.00 mm . With a current I = 0.85 A flowing through the winding, the magnetic induction in the gap is equal to B = 0.75 T . Assuming the scarttering of the magnetic flux at the grap edges to be negligible, find the permeaiility of iron under these conditions.

A thin ring made of magnetic has a mean diameter d = 30 cm and supports a winding of N = 800 turns. The cross-sectional area of the ring is equal to S = 5.0 cm^(2) . The ring has a cross-cut of width b = 2.0 mm . When the winding carries a certain current, the permeability of the magnectic equals mu = 1400 . Neglectign the disipation of magnetic flux at the gap edges, find: (a) the ratio of magnetic energies in the gap and in the magnetic, the inductance of the system, do it two ways: using the flux and using the energy of the field.

A permanent magnety is shaped as a ring with a narrow ghap between the poles. The mean diameter of the ring equals d = 20 cm . The width of the gap is equal to b = 2.0 mm and the magnetic induction in the gap is equal to b = 40mT'. Assuming that the scattering of the magnetic flux at the gap edges is negligible, find the modulus of the magnetic fleid strength vector inside the magnet.

A solenoid is 3 m long and its inner diameter is 4.0 cm . It has three layers of windings of 2000 turns each and carries a current of 2.0 amperes. The magnetic flux for an cross-section of the solenoid is nearly

A long solenoid of length L has a mean diameter D . It has n layers of windings of N turns each. If it carries a current ‘i’ the magnetic field at its centre will be

A long solenoid of length L has a mean diameter D . It has n layers of windings of N turns each. If it carries a current ‘i’ the magnetic field at its centre will be