Question

un consumator electric cu rezistenta r=280, alimentat timp de 10h de l o retea cu tensiunea u=220V. calculati : a) I =? , W=?

Answer 1

Deci R=280

I = U/R = 220/280 = 11/14 A

W=(U•U)/R• t= 220•220/280•36 000
= 22•220/28 • 36000 = 6 222 600 J =
6 222, 600 kJ = 6,222MJ