Question

Compare solenoid and bar magnet and state one similarity.
plz..write the proper answer!!

Answer 1

They both have magnetic field lines and both act as a magnet.
or do you mean electromagnet vs solenoid

Answer 2

BAR MAGNET

Bar Magnet is a natural magnet which may be rectangular or cylindrical in shape and produce magnetic properties naturally.

SOLENOID

Solenoid is comprised of an insulated copper wire wound on a cylindrical conducting rod such that its length is greater than its diameter .The Solenoid is from Greek word for channel.
It is temporary strong magnet,when connected through external source like battery or when electricity passed through it.It is also known as ELECTROMAGNET.


DISTINCTION BETWEEN SOLENOID AND BAR MAGNET.

1.A solenoid is a temporary magnet as it can readily be demagnetized by stopping the current through the solenoid whereas a bar magnet which is a permanent magnet cannot be demagnetized.
2.A solenoid produce a strong magnetic field whose strength can be changed by changing the current through it whereas the magnetic field of a permanent magnet is comparatively weak and its strength cannot be changed.
3. The polarity of a solenoid can be reversed by changing the direction of current through it whereas the polarity of permanent magnet is fixed and cannot be easily reversed.


SIMILARITY BETWEEN BAR MAGNET AND SOLENOID

1.Both have a attractive and directive properties.
2.The magnetic field lines are exactly identical to those due to a cylindrical bar magnet with one end of the solenoid acting as a south-pole and its other end as a north -pole.thus, a current-carrying solenoid behave like a bar magnet with fixed polarity at its ends.