The power rating of a resistor is 0.80 W. If the value of the resistor is 400 Ω, what is the maximum current it can draw?
A) 45 mA
B) 18 mA
C) 4.4 mA
D) 2.0 mA
E) 320 mA

Question

Quizplus · Accepted Answer

The maximum current that a resistor can draw is given by the square root of the power rating divided by the resistance. In this case, the maximum current is:I = sqrt(P/R) = sqrt(0.80 W / 400 Ω) = 0.045 A = 45 mA

The Power Rating of a Resistor Is 0