If ( r₁ = 3.0 , Ω, , r₂ = 6.0 , Ω, , r₃ = 12 , Ω, ) and ( I = 0.50 , A, ) at what rate is heat being generated in ( r₁ )?
a) 0.375 W
b) 0.750 W
c) 1.125 W
d) 1.500 W