Question

why Magnetic field lines are always
in form of concentric circles around a current
carrying Straight wire/ conductor.
​

Answer 1

$\huge\bf\underline\red{A}\underline {n}\underline\green {s}\underline {W}\underline\purple {e}\underline {r}\purple {:-}$

• a moving charge will produce both electric and magnetic field. The magnetic field lines in opposite directions will cancel each other and the ones in the same direction will add up, therefore the leftover field is in the form of concentric circle.

Answer 2

ᴀɴsᴡᴇʀ. ᴀ ᴍᴏᴠɪɴɢ ᴄʜᴀʀɢᴇ ᴡɪʟʟ ᴘʀᴏᴅᴜᴄᴇ ʙᴏᴛʜ ᴇʟᴇᴄᴛʀɪᴄ ᴀɴᴅ ᴍᴀɢɴᴇᴛɪᴄ ғɪᴇʟᴅ. ᴛʜᴇ ᴍᴀɢɴᴇᴛɪᴄ ғɪᴇʟᴅ ʟɪɴᴇs ɪɴ ᴏᴘᴘᴏsɪᴛᴇ ᴅɪʀᴇᴄᴛɪᴏɴs ᴡɪʟʟ ᴄᴀɴᴄᴇʟ ᴇᴀᴄʜ ᴏᴛʜᴇʀ ᴀɴᴅ ᴛʜᴇ ᴏɴᴇs ɪɴ ᴛʜᴇ sᴀᴍᴇ ᴅɪʀᴇᴄᴛɪᴏɴ ᴡɪʟʟ ᴀᴅᴅ ᴜᴘ, ᴛʜᴇʀᴇғᴏʀᴇ ᴛʜᴇ ʟᴇғᴛᴏᴠᴇʀ ғɪᴇʟᴅ ɪs ɪɴ ᴛʜᴇ ғᴏʀᴍ ᴏғ ᴄᴏɴᴄᴇɴᴛʀɪᴄ ᴄɪʀᴄʟᴇ.

ᴍᴀʀᴋ ᴍʏ ʙᴇsᴛɪᴇ ᴀs ʙʀᴀɪɴʟɪᴇsᴛ........

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