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Mereanu

O problema

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Cine ma poate ajuta si pe mine cu urmatoarea problema?Se da urmatorul circuit de forma circulara constituit dintr-un fir conductor omogen de sectiune constanta si de raza 10 cm, mult mai mare decat diametrul firului. Circuitul este plasat intr-o zona in care exista un camp magnetic uniform perpendicular pe planul circuitului (iesind din pagina), variabil in timp dupa legea B(t) = t/pi (t exprimat in secunde, B in tesla). Ce indica un voltmetru conectat intre punctele A si B diametral opuse?

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Ne testezi? Nu crezi ca este mai bine sa citesti un pic in carte, inainte sa ne ceri noua sa citim? Este o problema clasica de fizica de liceu cu schepsis. Fiind circuit inchis cu un fir omogen tensiunea in puncte diametral opuse este 0. Se poate calcula valoarea curentului in circuit dar nu se cere.

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