Question

Determine a potencia dissipada de um resistor de 2k ohms, submetido a uma ddp de 12v

Answer 1

$P = \frac{U^{2}}{R} = \frac{12^{2}}{2.10^{3}} = \frac{144.10^{-3}}{2} = 72.10^{-3}\\ P = 0,072 W$

Answer 2

P= u2/R

P= 144/2

P= 72 watt