Question

calculati valoarea maxima a tensiunii electrice alternative a retelei electrice care are valoarea efectiva de 220 V(volți)?
Sa scoateti va rog si datele din problemna!!!Rapid

Answer 1

U=220 V

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Umax=?

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Q=RI²T->curent continuu

Q=RImax²T/2->curent alternativ

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1=I²/2Imax²=>I²=2Imax²=>I=√2Imax=>Imax=I/√2=√2I/2=>Umax=√2U/2=√2*220/2=√2*110=110*1,41=15,1 V