what is solenoid?
and
what is its formula ?
Answers
Solenoid is made by looping a metal wire around a rod . The metal wire used should we made from the metal which is a good conductor. It generates the magnetic field when current is passed through it.
A solenoid is a helix whose diameter is comparatively very small than its length.
The Magnetic field are uniform inside the looping area of the solenoid. The field lines don't intersect each other.
When the current is passed through it a nearly uniform magnetic field is set up in the interior and along the axis of solenoid.
B = u. n I
if you want to increase the magnetic field then can we have to
(i) increases the intensity of current flowing through it
(ii). increase the number of turns per unit length.
Answer:
Explanation:
A solenoid is a bar magnet with strands of insulated copper wire wound around it.
The formula of its magnetic field=UonI,where Uo is the permeability,n is number of turns per unit length,I is the current through it.Hope you understood.