Why are the coils of electric irons and electric toasters made of an alloy rather than a pure metal ?
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Explanation:
This is Because
- (i) resistivity of an alloy is much higher than that of a pure metal
- (ii) an alloy does not undergo oxidation (or burn) easily even at high temperature.
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- ᴄᴏɪʟs ᴏғ ᴇʟᴇᴄᴛʀɪᴄ ᴛᴏᴀsᴛᴇʀs ᴀɴᴅ ᴇʟᴇᴄᴛʀɪᴄ ɪʀᴏɴs ᴍᴀᴅᴇ ᴏғ ᴀɴ ᴀʟʟᴏʏ ʀᴀᴛʜᴇʀ ᴛʜᴀɴ ᴀ ᴘᴜʀᴇ ᴍᴇᴛᴀʟ ᴅᴜᴇ ᴛᴏ ᴛʜᴇ ғᴏʟʟᴏᴡɪɴɢ ʀᴇᴀsᴏɴs: ᴛʜᴇ ʀᴇsɪsᴛɪᴠɪᴛʏ ᴏғ ᴀɴ ᴀʟʟᴏʏ ɪs ʜɪɢʜᴇʀ ᴛʜᴀɴ ᴛʜᴇ ᴘᴜʀᴇ ᴍᴇᴛᴀʟ. ᴀʟʟᴏʏ ᴅᴏᴇs ɴᴏᴛ ᴍᴇʟᴛ ʀᴇᴀᴅɪʟʏ ᴀɴᴅ ɢᴇᴛ ᴅᴇғᴏʀᴍᴇᴅ. ᴀʟʟᴏʏs ʜᴀᴠᴇ ᴀ ʟᴏᴡ-ᴛᴇᴍᴘᴇʀᴀᴛᴜʀᴇ ᴄᴏᴇғғɪᴄɪᴇɴᴛ ᴏғ ʀᴇsɪsᴛᴀɴᴄᴇ.♡
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