polarization of a non polar dielectric in an external electric field . explain ??
Answers
ɢᴏᴏᴅ ɴᴏᴏɴ ✌️
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ᴄᴏɴsɪᴅᴇʀ ᴀ ʀᴇᴄᴛᴀɴɢᴜʟᴀʀ sʟᴀʙ ᴏғ ᴀ ʟɪɴᴇᴀʀ ɪsᴏᴛʀᴏᴘɪᴄ ᴅɪᴇʟᴇᴄᴛʀɪᴄ ᴘʟᴀᴄᴇᴅ ɪɴ ᴀ ᴜɴɪғᴏʀᴍ ᴇxᴛᴇʀɴᴀʟ ᴇʟᴇᴄᴛʀɪᴄ ғɪᴇʟᴅ.
() ɪɴ ᴄᴀsᴇ ᴏғ ᴀ ɴᴏɴᴘᴏʟᴀʀ ᴅɪᴇʟᴇᴄᴛʀɪᴄ, ᴛʜᴇ ᴀᴘᴘʟɪᴇᴅ ғɪᴇʟᴅ sʟɪɢʜᴛʟʏ sᴇᴘᴀʀᴀᴛᴇs ᴛʜᴇ ᴄᴇɴᴛʀᴇs ᴏғ ɴᴇɢᴀᴛɪᴠᴇ ᴀɴᴅ ᴘᴏsɪᴛɪᴠᴇ ᴄʜᴀʀɢᴇ ɪɴ ᴀ ᴍᴏʟᴇᴄᴜʟᴇ, ᴛʜᴜs ɪɴᴅᴜᴄɪɴɢ ᴀɴ ᴇʟᴇᴄᴛʀɪᴄ ᴅɪᴘᴏʟᴇ ᴍᴏᴍᴇɴᴛ ɪɴ ᴛʜᴇ ᴅɪʀᴇᴄᴛɪᴏɴ ᴏғ ᴛʜᴇ ғɪᴇʟᴅ. ɪɴ ᴄᴀsᴇ ᴏғ ᴀ ᴘᴏʟᴀʀ ᴅɪᴇʟᴇᴄᴛʀɪᴄ, ᴛʜᴇ ᴘᴇʀᴍᴀɴᴇɴᴛ ᴅɪᴘᴏʟᴇ ᴍᴏᴍᴇɴᴛs ᴏғ ɪᴛs ᴍᴏʟᴇᴄᴜʟᴇs ᴀʀᴇ ᴘᴀʀᴛɪᴀʟʟʏ ᴀʟɪɢɴᴇᴅ ᴡɪᴛʜ ᴛʜᴇ ғɪᴇʟᴅ. ɪɴ ᴇɪᴛʜᴇʀ ᴄᴀsᴇ, ᴛʜᴇ ᴅɪᴇʟᴇᴄᴛʀɪᴄ ɪs sᴀɪᴅ ᴛᴏ ʙᴇ ᴘᴏʟᴀʀɪsᴇᴅ.
() ɪɴ ᴀ ᴜɴɪғᴏʀᴍʟʏ ᴘᴏʟᴀʀɪsᴇᴅ ᴅɪᴇʟᴇᴄᴛʀɪᴄ, ᴛʜᴇ ᴄʜᴀʀɢᴇs ᴏғ ᴀᴅᴊᴀᴄᴇɴᴛ ɪɴᴛᴇʀɪᴏʀ ᴅɪᴘᴏʟᴇs ᴀᴅᴅ ᴛᴏ ᴢᴇʀᴏ. ʙᴜᴛ ᴅᴜᴇ ᴛᴏ ᴛʜᴇ ᴜɴʙᴀʟᴀɴᴄᴇᴅ ᴘᴏsɪᴛɪᴠᴇ ᴇɴᴅs ᴏғ ᴅɪᴘᴏʟᴇs ᴀᴛ ᴏɴᴇ ғᴀᴄᴇ ᴏғ ᴛʜᴇ sʟᴀʙ, ʙᴏᴜɴᴅ ᴘᴏsɪᴛɪᴠᴇ ᴄʜᴀʀɢᴇ ᴀᴘᴘᴇᴀʀs ᴏɴ ᴛʜᴀᴛ ᴇxᴛᴇʀɪᴏʀ sᴜʀғᴀᴄᴇ. sɪᴍɪʟᴀʀʟʏ, ʙᴏᴜɴᴅ ɴᴇɢᴀᴛɪᴠᴇ ᴄʜᴀʀɢᴇ ᴀᴘᴘᴇᴀʀs ᴏɴ ᴛʜᴇ ᴏᴘᴘᴏsɪᴛᴇ ᴇxᴛᴇʀɪᴏʀ sᴜʀғᴀᴄᴇ ᴏғ ᴛʜᴇ sʟᴀʙ. ᴛʜᴇsᴇ ʙᴏᴜɴᴅ sᴜʀғᴀᴄᴇ ᴄʜᴀʀɢᴇs ᴀʀᴇ ᴄᴀʟʟᴇᴅ ᴘᴏʟᴀʀɪsᴀᴛɪᴏɴ ᴄʜᴀʀɢᴇs. ᴛʜᴇʀᴇ ɪs, ʜᴏᴡᴇᴠᴇʀ, ɴᴏ ᴇxᴄᴇss ᴄʜᴀʀɢᴇ ɪɴ ᴀɴʏ ᴠᴏʟᴜᴍᴇ ᴇʟᴇᴍᴇɴᴛ ᴡɪᴛʜɪɴ ᴛʜᴇ sʟᴀʙ ᴀɴᴅ ᴛʜᴇ sʟᴀʙ ᴀs ᴀ ᴡʜᴏʟᴇ ʀᴇᴍᴀɪɴs ᴇʟᴇᴄᴛʀɪᴄᴀʟʟʏ ɴᴇᴜᴛʀᴀʟ.
() ᴛʜᴇ ᴇxᴛᴇʀɴᴀʟ ᴇʟᴇᴄᴛʀɪᴄ ғɪᴇʟᴅ ᴘᴏʟᴀʀɪsᴇs ᴛʜᴇ ᴅɪᴇʟᴇᴄᴛʀɪᴄ, ʙᴜᴛ ᴅᴏᴇs ɴᴏᴛ ᴄᴀᴜsᴇ ᴀɴ ᴇʟᴇᴄᴛʀɪᴄ ᴄᴜʀʀᴇɴᴛ ᴛʜʀᴏᴜɢʜ ɪᴛ ᴀs ᴛʜᴇʀᴇ ᴀʀᴇ ɴᴏ ғʀᴇᴇ ᴄʜᴀʀɢᴇs ᴀᴠᴀɪʟᴀʙʟᴇ ғᴏʀ ᴍᴏᴛɪᴏɴ. ᴡɪᴛʜɪɴ ᴛʜᴇ ᴅɪᴇʟᴇᴄᴛʀɪᴄ, ᴛʜᴇ ғɪᴇʟᴅ ᴅᴜᴇ ᴛᴏ ᴛʜᴇ ᴘᴏʟᴀʀɪsᴀᴛɪᴏɴ ᴄʜᴀʀɢᴇs ɪs ᴏᴘᴘᴏsɪᴛᴇ ᴛᴏ ᴛʜᴇ ᴀᴘᴘʟɪᴇᴅ ғɪᴇʟᴅ. ʜᴇɴᴄᴇ, ᴛʜᴇ ɴᴇᴛ ᴇʟᴇᴄᴛʀɪᴄ ғɪᴇʟᴅ ᴡɪᴛʜɪɴ ᴛʜᴇ ᴅɪᴇʟᴇᴄᴛʀɪᴄ ɪs ʟᴇss ᴛʜᴀɴ ᴛʜᴇ ᴀᴘᴘʟɪᴇᴅ ғɪᴇʟᴅ.
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Answer:
When non-polar molecules are subjected to an external electric field, the positive and negative charges in the molecules are displaced in the opposite direction. ... Thus nonpolar molecules acquire induced dipole moment in the external electric field and are said to be polarised in the external electric field.
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