test","extracted_subject":"PHYSICS","extracted_chapter":"MOVING CHARGES AND MAGNETISM","extracted_topic":"MAGNETIC FIELD DUE TO A CURRENT ELEMENT, BIOT-SAVART LAW","questionPreviewUrl":"https://cdn.pureessence.tech/question-previews/packed_canvases/canvas_608.png?top_left_x=532&top_left_y=1004&width=532&height=301&app=solveeit"},"seo_metadata":{"keywords":[]},"doubt_solver_data":{"concept_summary":[]},"embeddings":[],"is_hidden":false,"_id":"66d23c8470136192204bde0d","slug":"a-long-solenoid-has-200-turns-per-cm-and-carries-a","content":"A long solenoid has 200 turns per cm and carries a current of 2.5 A. The magnetic field at its centre is\n\n[μ₀ = 4π× 10^–7Wb/m²]","options":[{"_id":"68a424cf7f15af4716cab3ef","text":"3.14 × 10^–2Wb/m2","sequence":0,"isCorrect":false},{"_id":"68a424cf7f15af4716cab3f0","text":"6.28 × 10^–2Wb/m²","sequence":1,"isCorrect":true},{"_id":"68a424cf7f15af4716cab3f1","text":"9.42 × 10^–2Wb/m²","sequence":2,"isCorrect":false},{"_id":"68a424cf7f15af4716cab3f2","text":"12.56 × 10^–2Wb/m²","sequence":3,"isCorrect":false}],"correct_answer":"6.28 × 10^–2Wb/m²","explanation":"\\(B = \\mu _ { 0 } n i = 4 \\pi \\times 10 ^ { - 7 } \\times \\frac { 200 } { 10 ^ { - 2 } } \\times 2.5 = 6.28 \\times 10 ^ { - 2 } \\mathrm {~Wb} / \\mathrm { m } ^ { 2 }\\).","question_type":"single_choice","appeared_in":[],"created_at":"2024-08-30T21:41:24.410Z","__v":0,"vector_store_id":"a9aac271-d34a-40c4-a0c8-e4a872dcb086","updated_at":"2024-08-30T21:41:24.410Z","isStarred":false},"params":{"questionSlug":"a-long-solenoid-has-200-turns-per-cm-and-carries-a"}}]}]]

Question: A long solenoid has 200 turns per cm and carries a current of 2.5 A. The magnetic field at its centr...

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