1. Magnetic effect of electric current
Magnet- an object which attracts the pieces of iron , Ni,Co, towards it.
2. Magnetic field lines-
• The imaginary lines which shows the magnetic field of magnet.
Characterstics of magnetic field lines
1. Start from north end in south
2. They do not intersect each other
3. More magnetism at denser part
Of line
3. Magnetic effect of current-
When flow through a wire then a magnetic field produce
surrounding of wire
Wire can be in three types
1. Straight
2. Loop
3. Solenoid
5. Electromagnet-
The magnet made up of solenoid.
Factors affecting the strength of electromagnet-
1.Number of coil
2. Electric current
3. Distance between poles
6. Force on current carrying conductor
in magnetic field -
Force can be identify by Fleming's left hand rule –
7. Electric motor-
• Take two bar magnets and keep the poles facing each other with a
small space in between. Now, take a small length of a conducting wire
and make a loop. Keep this loop in between the space between the
magnets such that it is still within the sphere of influence of the
magnets. Now for the last bit. Connect the ends of the loop to battery
terminals.
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