Why is the coil wrapped on conducting frame in a galvanometer?
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The coil of a galvanometer is wound on a metal frame so that it provide electromagnetic damping due to production of eddy currents in the frame which oppose the motion of the coil.
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ᴛʜᴇ ᴄᴏɪʟ ᴏғ ᴀ ɢᴀʟᴠᴀɴᴏᴍᴇᴛᴇʀ ɪs ᴡᴏᴜɴᴅ ᴏɴ ᴀ ᴍᴇᴛᴀʟ ғʀᴀᴍᴇ sᴏ ᴛʜᴀᴛ ɪᴛ ᴘʀᴏᴠɪᴅᴇ ᴇʟᴇᴄᴛʀᴏᴍᴀɢɴᴇᴛɪᴄ ᴅᴀᴍᴘɪɴɢ ᴅᴜᴇ ᴛᴏ ᴘʀᴏᴅᴜᴄᴛɪᴏɴ ᴏғ ᴇᴅᴅʏ ᴄᴜʀʀᴇɴᴛs ɪɴ ᴛʜᴇғʀᴀᴍᴇ ᴡʜɪᴄʜ ᴏᴘᴘᴏsᴇ ᴛʜᴇ ᴍᴏᴛɪᴏɴ ᴏғ ᴛʜᴇᴄᴏɪʟ.
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