chapter two inturduction Flashcards
In 1819 orested noticed that :
The compass made deflection when it was placed near a wire carrying an electric current That mean ; passing of electric current in a conductor makes it like magnet
how many type of magnet and tell me about them
perment magnet
electric magnet
what you know about magnet
- the magnet attract
some metals liquid all metals
- each magnet has ………. poles
- when magnet is hanged freely what will happen
- like poles ……….. but unlike poles ……….
- eash magnet surrounded by …….. which
- some metals
- two
- When magnet is hanged by thread to be able to rotate seeking the geographic North pole while the other pole will point the geographic south affected by the earth’s magnetic filed
- rebal eash other
- attract eash other
- space
- where the effect of the magnetic force appears called magnetic field
is you want to know the shape of magnetic filed ( space )
Throw iron filling on a card board above the magnet then knock the corner of the card board slightly
the iron felling take the shape of the magnetic filled of this magnet
the shape of the of magnet differ acording to
the shape of tha magnet
the magnet looks like lines called
masgnetic flux lines
the magnetic flix lines directed from ( N pole TO S pole ) …….. the magnet and from ( S pole TO N pole ) .;……………. the magnet
- outside
- inside
diff magnetic filed
It is the space where the effect of the magnetic force appears
diff Magnetic flux density (B)
rule and unit`
It is the number of the magnetic flux lines that pass normally through a unit area
B = Øm \ A x COSseta
tesla
the magnetic flux lines at the point represents ……………..
the strength of the magnetic filed at thic ponit
diff magnetic flux lines
rule and unit
It is the total number of the magnetic flux passes normally in a given area
Øm=B x A COSseta
weber
seta in relation B x A COS seta
is the angle of rotation from the perpendicular position
or the angle between the normal to the coil plane and mkagnetic flux lines
