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what are permanent magnet and electromagnet? Give two uses of each
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Answers
PERMANENT MAGNET
A magnet is a material or object that produces a magnetic field.
USES
Permanent magnets are used in the following major groups: acoustic transducers, motors and generators, magneto mechanical devices, and magnetic field and imaging systems.
You will find permanent magnets in many products, such as televisions, telephones, computers, audio systems and automobiles.
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ELECTROMAGNET
soft metal core made into a magnet by the passage of electric current through a coil surrounding it.
USES
Electromagnets are very widely used in electric and electromechanical devices, including: Motors and generators. Transformers. Relays. Electric bells and buzzers. Loudspeakers and headphones. Actuators such as valves. Magnetic recording and data storage equipment: tape recorders, VCRs, hard disks. MRI machines.
Answer:
28 ᴀᴘʀ 1997
ᴅᴇʜʀᴀ.
ᴅᴇᴀʀ ᴀʀᴜɴ;
ʜᴏᴘᴇ ʏᴏᴜ ᴀʀᴇ ᴇɴᴊᴏʏɪɴɢ ʏᴏᴜʀ ᴠᴀᴄᴀᴛɪᴏɴ ᴛʜᴇʀᴇ. ɪ ᴀᴍ ᴅᴏɪɴɢ ᴛʜᴇ sᴀᴍᴇ ʜᴇʀᴇ, ᴀᴛ ɢʀᴀɴᴅᴘᴀ’s
ʜᴏᴜsᴇ. ɪ ɢᴏᴛ ᴀ ɴᴇᴡ ғʀɪᴇɴᴅ ʜᴇʀᴇ. ᴅᴏ ʏᴏᴜ ᴋɴᴏᴡ ᴡʜᴏ ᴛʜᴇ ɴᴇᴡ ғʀɪᴇɴᴅ ɪs? ᴀ ʟɪᴛᴛʟᴇ, ᴄᴜᴛᴇ sǫᴜɪʀʀᴇʟ
ɢʀᴇʏ ɪɴ ᴄᴏʟᴏᴜʀ! ɪɴ ᴛʜᴇ ʙᴇɢɪɴɴɪɴɢ ʜᴇ ᴡᴀs ᴀ ʟɪᴛᴛʟᴇ ʀᴇsᴇɴᴛғᴜʟ ᴛᴏᴡᴀʀᴅs ᴍᴇ. ʙᴜᴛ ɴᴏᴡ, ғɪɴᴅɪɴɢ ᴛʜᴀᴛ ɪ
ᴀᴍ ɴᴏᴛ ʜᴀʀᴍғᴜʟ, ʜᴇ ɪs ᴠᴇʀʏ ғʀɪᴇɴᴅʟʏ ᴀɴᴅ ғᴀᴍɪʟɪᴀʀ ᴡɪᴛʜ ᴍᴇ ᴇᴠᴇɴ ᴛᴏ ᴛᴀᴋᴇ ғᴏᴏᴅ ғʀᴏᴍ ᴍʏ ʜᴀɴᴅs.
ʏᴏᴜ ᴋɴᴏᴡ ɪɴ ᴏᴜʀ ɢᴀʀᴅᴇɴ ᴛʜᴇʀᴇ ɪs ᴀ ᴍᴀɢɴɪғɪᴄᴇɴᴛ ʙᴀɴʏᴀɴ ᴛʀᴇᴇ, ᴡʜɪᴄʜ ɪs ᴏʟᴅᴇʀ ᴛʜᴀɴ ᴍʏ ɢʀᴀɴᴅᴘᴀ,
ɪᴛ ᴏʟᴅ ᴀs ᴛʜᴇ ᴛᴏᴡɴ ᴏғ ᴅᴇʜʀᴀ. ɪ ᴏғᴛᴇɴ sᴘᴇɴᴅ ᴍʏ ғʀᴇᴇ ᴛɪᴍᴇ ᴏɴ ᴛʜᴇ ᴛʀᴇᴇ, ᴀɴᴅ ᴛʜᴇ sǫᴜɪʀʀᴇʟ ᴡɪʟʟ ᴀʟsᴏ
ʙᴇ ᴛʜᴇʀᴇ ᴡɪᴛʜ ᴍᴇ. ᴛʜᴇʀᴇ ɪ ʜᴀᴠᴇ ʙᴜɪʟᴛ ᴀ sᴍᴀʟʟ ᴘʟᴀᴛғᴏʀᴍ ᴏɴ ᴛʜᴇ ʜᴀʟғᴡᴀʏ ᴜᴘ ᴛʜᴇ ᴛʀᴇᴇ. ɪ ᴄᴏᴜʟᴅ ʀᴇᴀᴅ
ғʀᴏᴍ ᴛʜᴇʀᴇ. ɪ ʜᴀᴅ ᴡɪᴛɴᴇssᴇᴅ ғᴏʀ ᴀ ғɪɢʜᴛ ʙᴇᴛᴡᴇᴇɴ ᴍᴏɴɢᴏᴏsᴇ ᴀɴᴅ ᴄᴏʙʀᴀ, ɪɴ ᴛʜᴀᴛ ᴍᴏɴɢᴏᴏsᴇ ᴡᴀs
ᴠᴀɴǫᴜɪsʜᴇᴅ. ᴀ ғᴇᴡ ᴅᴀʏs ᴀɢᴏ, ᴍʏ ɢʀᴀɴᴅᴘᴀ ʙʀᴏᴜɢʜᴛ ᴀ ᴡʜɪᴛᴇ ʀᴀᴛ ᴛᴏ ʜᴏᴍᴇ, ᴡʜɪᴄʜ ʜᴇ ʜᴀᴅ ʙᴏᴜɢʜᴛ
ғʀᴏᴍ ᴛʜᴇ ʙᴀᴢᴀᴀʀ ғᴏʀ ғᴏᴜʀ ᴀɴɴᴀs. ɪ ᴏғᴛᴇɴ ᴛᴀᴋᴇ ɪᴛ ᴡɪᴛʜ ᴍᴇ ᴛᴏ ᴛʜᴇ ʀᴏᴏᴛ ᴏʀ ᴘʟᴀᴛғᴏʀᴍ ɪɴ ᴛʜᴇ ᴛʀᴇᴇ.
sᴏᴏɴ ɪᴛ ᴍᴀᴅᴇ ᴀ ғʀɪᴇɴᴅsʜɪᴘ ᴡɪᴛʜ ᴏɴᴇ ᴏғ ᴛʜᴇ sǫᴜɪʀʀᴇʟs ɪɴ ᴛʜᴇ ʙᴀɴʏᴀɴ ᴛʀᴇᴇ. ᴛʜᴇʀᴇ ᴀ sᴛʀᴀɴɢᴇ ᴛʜɪɴɢ
ʜᴀᴘᴘᴇɴᴇᴅ. ᴛʜᴇ sǫᴜɪʀʀᴇʟ sᴛᴀʀᴛᴇᴅ ʙᴜɪʟᴅɪɴɢ ᴀ ɴᴇsᴛ ɪɴ ᴀ ʜᴏʟᴇ ɪɴ ᴛʜᴇ ᴛʀᴇᴇ. ᴡʜᴇɴ ᴡᴇ ɪɴᴠᴇsᴛɪɢᴀᴛᴇᴅ ɪᴛ,
ᴡᴇ ғᴏᴜɴᴅ ᴛʜʀᴇᴇ ʟɪᴛᴛʟᴇ ᴡʜɪᴛᴇ sǫᴜɪʀʀᴇʟs! ᴍʏ ɢʀᴀɴᴅᴘᴀ sᴀɪᴅ ᴛʜᴀᴛ ʜᴇ ʜᴀᴅɴ’ᴛ sᴇᴇɴ ᴡʜɪᴛᴇ sǫᴜɪʀʀᴇʟs
ʙᴇғᴏʀᴇ ɪɴ ʜɪs ʟɪғᴇ. ʜᴇ ᴀʟsᴏ ᴇxᴘʟᴀɪɴᴇᴅ ᴛʜᴀᴛ ᴛʜᴇ ᴡʜɪᴛᴇ ʀᴀᴛ sʜᴏᴜʟᴅ ʙᴇ ᴛʜᴇ ғᴀᴛʜᴇʀ ᴏғ ᴡʜɪᴛᴇ ʙᴀʙʏ
sǫᴜɪʀʀᴇʟs.
ɪ ᴡᴀɴᴛᴇᴅ ʏᴏᴜʀ ᴘʀᴇsᴇɴᴄᴇ ᴡɪᴛʜ ᴍᴇ ɪɴ ᴛʜɪs ᴠᴀᴄᴀᴛɪᴏɴ. ᴡᴇ ᴄᴀɴ sᴘᴇɴᴅ ᴛʜᴇ ᴛɪᴍᴇ ɪɴ ᴛʜᴇ ɢᴀʀᴅᴇɴ
ᴀɴᴅ ᴏɴ ᴛʜᴇ ʙᴀɴʏᴀɴ ᴛʀᴇᴇ. ʏᴏᴜ ᴡɪʟʟ ʙᴇ ʜᴀᴘᴘʏ ᴛᴏ sᴇᴇ ᴛʜᴇ ʙᴇᴀᴜᴛɪғᴜʟ ʟᴀɴᴅ ɪɴ ᴅᴇʜʀᴀ, ᴀɴᴅ ʟɪᴠᴇ ɪɴ ɪᴛ.
ᴄᴏɴᴠᴇʏ ᴍʏ ʀᴇɢᴀʀᴅs ᴛᴏ ᴀʟʟ. ɪ ʜᴏᴘᴇ ᴛᴏ sᴇᴇ ʏᴏᴜ sᴏᴏɴ.
ʏᴏᴜʀs ʟᴏᴠɪɴɢʟʏ,
ɴᴀᴍᴇ
sᴅ/