the total flux (flux in iron path)
to the useful flux (flux in air gap)
as the number of lines per unit area through any substance in a plane at right angles to the lines of force
flux density produced in it due to its own induced magnetism
force acting on a unit n- pole
placed at that point is called
ratio between the intensity of magnetization
produced in a substance to the magnetizing force producing it
61. The lagging
effect between flux density of the material and the magnetizing force applied
to the magnetic lines
to the non- metallic materials that
have the ferromagnetic properties of iron.
air space between poles of magnets
has magnetic poles
produced by internal
atomic structure with no external current
effects of the earth as a huge magnet with
north and south poles.
C. Terrestrial magnetism
maintain strength of magnetic field
magnetic field originates from
field inside a solenoid
B. is uniform
distance from the axis
distance from the axis
the ferromagnetic substance is inserted
in a current- carrying
solenoid, the magnetic field is
field of a bar magnet most closely
resembles the magnetic field of
current- carrying wire
electrons moving parallel to one another
magnetic field of a magnetized iron bar when strongly heated
unmagnetized iron bar
stationary electric charge
current if flowing east along a
power line. If the earth’s field is neglected,
the direction of the magnetic field below it is
induced emf in a wire loop that is moved parallel to a uniform magnetic field is
the area of the loop
the shape of the loop
the magnitude of the field
flux through a wire loop in a
magnetic field does not depend on
of the field
between the plane of the loop and the direction
is hard to magnetize because of its
substance has a relative permeability of
greater than one
magnetically aligned atoms is called
force between two magnetic poles varies with the distance between them. The
variation is to
the square of that distance.
conductivity of the material for magnetic lines of force
magnetization test in the material
after exciting field has been removed
of an electromagnet
of the permanent magnet
electromagnet with its core in the
form of a close magnetic ring.
magnetic material losses its ferromagnetic properties at a point called
generated by a conductor with current in an
external magnetic field.
of electrons from hot bodies is called
B. Edison effect
ability of a mechanically stressed
ferromagnetic wire to recognize rapid switching of magnetization when subjected
to a dc magnetic field.
C. Wiegand effect
which is generally used in the gausameter to measure flux density.
contribution to the ionization in an ionization chamber by electrons liberated
from the walls.
tiniest element of matter
(gas, liquid and solid) are composed of
type of atom to exist is the atom.
about the positive nucleus in a
particles which have no effect on
its atomic charge.
of a hydrogen atom is approximately cm.
1.1 x 10^-8
the first shell has how many
permissible number of orbiting electrons?
atom has an atomic weight of 72. How many neutrons are there?
neutrons does a copper atom have?
of atoms that is due to the force of
attraction between positive ions and a group of negative ions
alloy of 22 percent iron and 78 per cent nickel.