Предмет: Физика, автор: ainfarkt

Електричне коло, що складається із чотирьох прямих горизонтальних провідників та джерела струму, перебуває в магнітному полі, напрямок якого вказано на рисунку. Визнач напрямок сили Ампера, що діє на провідник 3-2.

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Автор ответа: ggigroniys

Ответ:Сила Ампера діє на провідник у відповідності з правилом визначення її напрямку:

Правило лівого витку (або правило лівої руки) для сил Ампера визначає напрямок цих сил на провідник. Згідно з цим правилом, якщо ви зігнете великий палець лівої руки, вказуючи в напрямку струму, а інші пальці вказують в напрямку від Вами до провідника, то відведена вашим великим пальцем руки (кулачок) вказуватиме на напрямок сили Ампера, що діє на провідник.

У вашому описаному випадку провідник 3-2 має струм, що направлений зліва направо (за стрілкою на рисунку). Отже, якщо ви встановите великий палець лівої руки в напрямку струму, інші пальці будуть вказувати від Вами до провідника, і ваш великий палець буде вказувати на напрямок сили Ампера, що діє на провідник 3-2.

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