Question

The magnetic inside a long straight solenoid carrying current :; A. is zero; B. decreases as we move towards its end.; C. increases as we move towards its end.; D. is the same at all points.

Answer 1

Answer:

at both axial ends it is half of the magnetic field at axial point which is well inside solenoid

Answer 2

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Cᴏʀʀᴇᴄᴛ ᴏᴘᴛɪᴏɴ ↠

ᴅ) ɪs ᴛʜᴇ sᴀᴍᴇ ᴀᴛ ᴀʟʟ ᴘᴏɪɴᴛs.

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Exᴘʟᴀɴᴀᴛɪᴏɴ ↠

Tʜᴇ ᴍᴀɢɴᴇᴛɪᴄ ғɪᴇʟᴅ ɪɴsɪᴅᴇ ᴀ ʟᴏɴɢ sᴛʀᴀɪɢʜᴛ ᴄᴜʀʀᴇɴᴛ-ᴄᴀʀʀʏɪɴɢ sᴏʟᴇɴᴏɪᴅ ɪs ᴜɴɪғᴏʀᴍ ᴡʜɪᴄʜ ɪs ʀᴇᴘʀᴇsᴇɴᴛᴇᴅ ʙʏ ᴘᴀʀᴀʟʟᴇʟ ʟɪɴᴇs. Hᴇɴᴄᴇ, ᴛʜᴇ ᴍᴀɢɴᴇᴛɪᴄ ғɪᴇʟᴅ ɪɴsɪᴅᴇ ᴀ ʟᴏɴɢ sᴛʀᴀɪɢʜᴛ sᴏʟᴇɴᴏɪᴅ ᴄᴀʀʀʏɪɴɢ ᴄᴜʀʀᴇɴᴛ ɪs ᴛʜᴇ sᴀᴍᴇ ᴀᴛ ᴀʟʟ ᴘᴏɪɴᴛs.

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