Question

Unei rezistente de 48 omi i se aplica o tensiune de220 v
.cqre e puterea?

Answer 1

$R=48 \ \Omega \\ U=220 \ V \\ \boxed{P-?} \\ \bold{Rezolvare:} \\ \boxed{P=U \cdot I}\\ I=\frac{U}{R} \\ I=\frac{220 \ V}{48 \ \Omega} \\ I=4,583 \ A \\ P=4,583 \ A \cdot 220 \ V \\ \Rightarrow \boxed{P=1 \ 008,3 \ W}$