A 3.3 kΩ resistor dissipates 0.25 W. The current is

1. 

A 3.3 k resistor dissipates 0.25 W. The current is
[A]. 8.7 mA
[B]. 87 mA
[C]. 8.7 µA
[D]. 8.7 A

Answer: Option A

Explanation:

W = I2R

I = square root(W/R)

= square root( 0.25/(3.3x1000) )

= 0.0087038828

= 8.7 mA

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