Science- Energy- Circuits

Image 1

Image 2

In image 1, calculations:
V=18 V
I=1.8 A

R=18/1.8
   =10 Ω

In image 2, calculations:
V=18 V
I=0.9 A

R (total) = 18/0.9
R (total) = 20 Ω
(Which is 10 Ω resistant, and it's the same answer to image 1)

OR

I= V/R = 18/2x10 = 18/20 = 0.9 A (Which is the current measured in image 2)