Question

Não consegui fazer... me ajude

Answer 1

Convém lembrarmos da fórmula :

                                               P = U² / R

Onde:                                     2700 = 220² / R

P = 2700W                            R = 220 . 220 / 2700

U = 220V                                R = 22.22 / 27

R = ?                                        R = 17, 93 Ω