Question

b) electrical heating device. why ?​

Answer 1

Explanation:

Alloys have very high resistance, so when the current passes through the alloy, it offers great resistance. The high resistance produces heat, which is required in such appliances. If the heating elements were made of pure metal, they would have low resistance.

Answer 2

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ᴀʟʟᴏʏꜱ ʜᴀᴠᴇ ᴠᴇʀʏ ʜɪɢʜ ʀᴇꜱɪꜱᴛᴀɴᴄᴇ, ꜱᴏ ᴡʜᴇɴ ᴛʜᴇ ᴄᴜʀʀᴇɴᴛ ᴘᴀꜱꜱᴇꜱ ᴛʜʀᴏᴜɢʜ ᴛʜᴇ ᴀʟʟᴏʏ, ɪᴛ ᴏꜰꜰᴇʀꜱ ɢʀᴇᴀᴛ ʀᴇꜱɪꜱᴛᴀɴᴄᴇ. ᴛʜᴇ ʜɪɢʜ ʀᴇꜱɪꜱᴛᴀɴᴄᴇ ᴘʀᴏᴅᴜᴄᴇꜱ ʜᴇᴀᴛ, ᴡʜɪᴄʜ ɪꜱ ʀᴇQᴜɪʀᴇᴅ ɪɴ ꜱᴜᴄʜ ᴀᴘᴘʟɪᴀɴᴄᴇꜱ. ɪꜰ ᴛʜᴇ ʜᴇᴀᴛɪɴɢ ᴇʟᴇᴍᴇɴᴛꜱ ᴡᴇʀᴇ ᴍᴀᴅᴇ ᴏꜰ ᴘᴜʀᴇ ᴍᴇᴛᴀʟ, ᴛʜᴇʏ ᴡᴏᴜʟᴅ ʜᴀᴠᴇ ʟᴏᴡ ʀᴇꜱɪꜱᴛᴀɴᴄᴇ.

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