A student sets up the circuit shown below to investigate current division in parallel branches:
The current measured by ammeter A1 A_1\,A1 is 1.8 A.
What is the reading on ammeter A2A_2A2?
0.60 A0.60\text{ A}0.60 A
0.90 A0.90\text{ A}0.90 A
1.20 A1.20\text{ A}1.20 A
1.80 A1.80\text{ A}1.80 A