The following figure shows the RL circuit, where in A1, A2 and A3 are ideal ammeters. If A3 reads 13A and A2 reads 5A, then A1 should read current as ________.
1
0 A
2
8 A
3
12 A
4
-8 A
The following figure shows the RL circuit, where in A1, A2 and A3 are ideal ammeters. If A3 reads 13A and A2 reads 5A, then A1 should read current as ________.