Physics
Related Questions
A student was studying about the properties of magnets. He compiled his notes in a table. However, there were some mistakes in the table. Correct the given table.
Property of Magnets Explanation Correction(s) Attractive property A magnet attracts all kinds of materials. Directive property The end of the magnet pointing towards the geographical north is the south pole and the end of the magnet pointing towards the geographical south is the south pole. Coexistence of poles When a magnet is broken into a half, the north pole and south pole are separated. True test for magnetism Like poles of the magnet attract each other while unlike poles repel each other. Strength of the magnet The strength of the magnet is uniform throughout its length. Roshan's parents gifted him magnets on his birthday. His parents told him that magnets could attract objects. He played with those magnets all day and experimented by attracting different materials onto it. He noticed that some materials got attracted to it while some didn't. After a few days, his magnets were not working well.
Now, answer the following questions.
(a) What materials do you think got attracted to the magnets?
(b) What materials do you think didn't get attracted to the magnets?
(c) Why do you think his magnets stopped working?
(d) What should Roshan do to fix his magnets?
It is easier to separate iron filings from sand than to separate iron filings from a metallic mixture. Why?
Why doesn't the soft iron retain magnetism once the electric current stops flowing through the wire around it?