What are eddy currents ? State applications any two of eddy currents
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Eddy currents (also called Foucault's currents) are loops of electrical current induced within conductors by a changing magnetic field in the conductor according to Faraday's law of induction. Eddy currents flow in closed loops within conductors, in planes perpendicular to the magnetic field.
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(2)-Induction motor, the eddy currents may be used to rotate the rotor. When a metallic cylinder(or rotor) is placed in a rotating magnetic field , eddy currents are produced in it. According to Lenz's law, these currents tends to reduce to relative motion between the cylinder and the field.
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- Eᴅᴅʏ ᴄᴜʀʀᴇɴᴛs (ᴀʟsᴏ ᴄᴀʟʟᴇᴅ Fᴏᴜᴄᴀᴜʟᴛ's ᴄᴜʀʀᴇɴᴛs) ᴀʀᴇ ʟᴏᴏᴘs ᴏғ ᴇʟᴇᴄᴛʀɪᴄᴀʟ ᴄᴜʀʀᴇɴᴛ ɪɴᴅᴜᴄᴇᴅ ᴡɪᴛʜɪɴ ᴄᴏɴᴅᴜᴄᴛᴏʀs ʙʏ ᴀ ᴄʜᴀɴɢɪɴɢ ᴍᴀɢɴᴇᴛɪᴄ ғɪᴇʟᴅ ɪɴ ᴛʜᴇ ᴄᴏɴᴅᴜᴄᴛᴏʀ ᴀᴄᴄᴏʀᴅɪɴɢ ᴛᴏ Fᴀʀᴀᴅᴀʏ's ʟᴀᴡ ᴏғ ɪɴᴅᴜᴄᴛɪᴏɴ. ... Tʜᴇ ᴄᴜʀʀᴇɴᴛ ғʟᴏᴡɪɴɢ ᴛʜʀᴏᴜɢʜ ᴛʜᴇ ʀᴇsɪsᴛᴀɴᴄᴇ ᴏғ ᴛʜᴇ ᴄᴏɴᴅᴜᴄᴛᴏʀ ᴀʟsᴏ ᴅɪssɪᴘᴀᴛᴇs ᴇɴᴇʀɢʏ ᴀs ʜᴇᴀᴛ ɪɴ ᴛʜᴇ ᴍᴀᴛᴇʀɪᴀʟ.
- Iɴᴅᴜᴄᴛɪᴏɴ ᴍᴏᴛᴏʀ, ᴛʜᴇ ᴇᴅᴅʏ ᴄᴜʀʀᴇɴᴛs ᴍᴀʏ ʙᴇ ᴜsᴇᴅ ᴛᴏ ʀᴏᴛᴀᴛᴇ ᴛʜᴇ ʀᴏᴛᴏʀ. Wʜᴇɴ ᴀ ᴍᴇᴛᴀʟʟɪᴄ ᴄʏʟɪɴᴅᴇʀ(ᴏʀ ʀᴏᴛᴏʀ) ɪs ᴘʟᴀᴄᴇᴅ ɪɴ ᴀ ʀᴏᴛᴀᴛɪɴɢ ᴍᴀɢɴᴇᴛɪᴄ ғɪᴇʟᴅ , ᴇᴅᴅʏ ᴄᴜʀʀᴇɴᴛs ᴀʀᴇ ᴘʀᴏᴅᴜᴄᴇᴅ ɪɴ ɪᴛ. Aᴄᴄᴏʀᴅɪɴɢ ᴛᴏ Lᴇɴᴢ's ʟᴀᴡ, ᴛʜᴇsᴇ ᴄᴜʀʀᴇɴᴛs ᴛᴇɴᴅs ᴛᴏ ʀᴇᴅᴜᴄᴇ ᴛᴏ ʀᴇʟᴀᴛɪᴠᴇ ᴍᴏᴛɪᴏɴ ʙᴇᴛᴡᴇᴇɴ ᴛʜᴇ ᴄʏʟɪɴᴅᴇʀ ᴀɴᴅ ᴛʜᴇ ғɪᴇʟᴅ.
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