8. 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

Option A
Explanation:
W = I2R

I = square root(W/R)

= square root( 0.25/(3.3x1000) )

= 0.0087038828

= 8.7 mA