Question

A solenoid 15cm long, has 300 turns, I=5A,B=
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Answer 1

★Gɪᴠᴇɴ :-

• N = 300 ᴛᴜʀɴs
• ʟ = 15ᴄᴍ
• ɪ = 5A

★Tᴏ Fɪɴᴅ :-

• B = ?

★Fᴏʀᴍᴜʟᴀ :-

B = nɪμο -----------for solenoid.

Where ,

• n = turns /length
• I = current
• μο = permiability constant = 4π × 10¯⁷ N/A²

★Sᴏʟᴜᴛɪᴏɴ :-

B =( 300/15) × 5 × 4π × 10¯⁷

B = 100 × 4π × 10¯⁷

B= 4π × 10¯⁵ Tesla.

hope it helps........✌️✌️