A soft-iron toroid is concentric with a long straight conductor carrying a direct current I. If the relative permeability μr of soft-iron is 100, the ratio of the magnetic flux densities at two adjacent points located just inside and just outside the toroid, is _______.
\(B = \frac{{{\mu _{rel\;{\mu _o}}}I}}{{2\pi r}}\)
\(\frac{{{B_{inside}}}}{{{B_{outside}}}} = {\mu _{rel}} = 100\)
Important Questions from Magnetostatics
A magnetic pressure which sets up or tends to set up flux in a magnetic circuit is called-
A coil of 600 turns and of resistance of 20 Ω is wound uniformly over a steel ring of mean circumference 30 cm and cross sectional area 9 cm2. If the relative permeability of the ring is 1600. Find the value of reluctance.
The unit of magnetic flux density is
The B-H curve for ______ will be a straight line passing through the origin.
The SI unit of permeability is:
