U1=220 B U2=200 B P1=250 Вт Р2=?
P=U²/R R=U²/P
U1²/P1=U2²/P2 P2=(U2/U1)²*P1=(200/220)²*250=207 Вт
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U1=220 B U2=200 B P1=250 Вт Р2=?
P=U²/R R=U²/P
U1²/P1=U2²/P2 P2=(U2/U1)²*P1=(200/220)²*250=207 Вт
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