Um resistor, submetido a uma diferença de potencial de 12,0 V, dissipa potência de 12 W. Podemos afirmar que a resistência elétrica desse resistor será de:
a) 6,0 ohms
b) 3,0 ohms
c) 1,0 ohms
d) 12,0 ohms
e) 9,0 ohms
a) 6,0 ohms
b) 3,0 ohms
c) 1,0 ohms
d) 12,0 ohms
e) 9,0 ohms
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Resposta:
D
Explicação:
[tex]P=D^2/R \\\\12 = 12^2/R\\\\R = 12*12/12\\\\R = 12 (D)[/tex]