Мощность электроплитки , рассчитанной на напряжение 220в равна 0,6 квт .какова сила тока в ее спирали? каково ее сопротивление?
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Напряжение U=220 В
Сила тока I=?
Сопротивление R=?
I=P/U=600/220=2.73 A
R=U/I=220/2.73=80.6 Om
P=0,6кВт = 600Вт
U=220В
Решение:
P=U*I, I=P/U=600/220=2,7А
R=U/I=220/2,7=81,5Ом