Select the magnetic materials from the following.
Separate magnetic and nonmagnetic materials from the following list. Steel, rubber, paper, soft iron ,cobalt and wood
When we pass electricity through the coil, it produces magnetic field around the soft iron piece and this soft iron piece becomes electromagnet and its magnetic strength can be changed by changing the amount of current flowing the coil. Electromagnets have various uses in the industry. It can be used to separate magnetic material from non-magnetic material as it will attract all the magnetic material, thus leaving behind all the non- magnetic material. When we press the button for electric bell outside anyone's house, what happens? You hear a sound but that sound remains only till you press the button as soon as you remove your finger, the sound stops.
The mechanism which explains the bell out of the following is?
Consider the following statements :
(i) Soft iron conducts electricity
(ii) Soft iron is magnetic material
(iii) Soft iron is used for magnetic permanent magnets
(iv) Soft iron is used as electro magnet