Question:

A 2 W carbon resistor is color coded with green, black, red and brown respectively. The maximum current which can be passed through this resistor is

63 mA

0.4 mA

20 mA

100 mA

The correct option is D
20 mA
P=i²R. ∴forimax,Rmust be minimum
from color coding R=50×10²Ω∴imax=20 mA.