The current at point B and point C is 0.36A. Therefore, the current at point A in the series circuit is also 0.36A;

In the parallel circuit, the current at point B = 0.48a-0.22a = 0.26a for the first time, and the current at point A = 0.22a+0. 18a = 0.40a for the second time.

Comparing the data, we can know that the current intensity of the series circuit is equal everywhere (ia = IB = IC); The main current of parallel circuit is equal to the sum of each branch current (ia = IB+IC).

Please refer to the table below.

①0.36 ③0.26 ④0.40② The current intensity of series circuit is equal everywhere.

(IA=IB=IC) ⑤ The main current of the parallel circuit is equal to the sum of the currents of each branch (IA=IB+IC).