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.

Find the magnetic moment of a thin round loop with current if the radius of the loop is equal to R = 100 mm and the magnetic induction at its centre is equal to B = 6.0 mu T .

Find the magnetic moment of a thin round loop with current if the radius of the loop is equal to R = 100 mm and the magnetic induction at its centre is equal to B = 6.0 mu T .

Find the magnetic moment of a thin round loop with current if the radius of the loop is equal to R and the magnetic induction at its centre is equal to B.

What is the magnetic moment of a current carrying thin circular loop if the radius of the loop is equal to R and the magnetic induction at its centre is equal to B ?

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.

Are the two poles of a magnet equally strong?

Are the two pole of magnet equally strong?

The dimension of the ratio of magnetic flux and the resistance is equal to that of: