When does an electromagnet operate??
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- ᴀɴ ᴇʟᴇᴄᴛʀᴏᴍᴀɢɴᴇᴛ ɪs ᴀ ᴍᴀɢɴᴇᴛ ᴛʜᴀᴛ ʀᴜɴs ᴏɴ ᴇʟᴇᴄᴛʀɪᴄɪᴛʏ. ᴜɴʟɪᴋᴇ ᴀ ᴘᴇʀᴍᴀɴᴇɴᴛ ᴍᴀɢɴᴇᴛ, ᴛʜᴇ sᴛʀᴇɴɢᴛʜ ᴏғ ᴀɴ ᴇʟᴇᴄᴛʀᴏᴍᴀɢɴᴇᴛ ᴄᴀɴ ᴇᴀsɪʟʏ ʙᴇ ᴄʜᴀɴɢᴇᴅ ʙʏ ᴄʜᴀɴɢɪɴɢ ᴛʜᴇ ᴀᴍᴏᴜɴᴛ ᴏғ ᴇʟᴇᴄᴛʀɪᴄ ᴄᴜʀʀᴇɴᴛ ᴛʜᴀᴛ ғʟᴏᴡs ᴛʜʀᴏᴜɢʜ ɪᴛ. ᴛʜᴇ ᴘᴏʟᴇs ᴏғ ᴀɴ ᴇʟᴇᴄᴛʀᴏᴍᴀɢɴᴇᴛ ᴄᴀɴ ᴇᴠᴇɴ ʙᴇ ʀᴇᴠᴇʀsᴇᴅ ʙʏ ʀᴇᴠᴇʀsɪɴɢ ᴛʜᴇ ғʟᴏᴡ ᴏғ ᴇʟᴇᴄᴛʀɪᴄɪᴛʏ.
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