In a liquid, a current is set up between points A and B. Positive ions flow from A to B and carry 6.0 coulombs of positive charge per second, while negative ions move from B to A with 2.0 coulombs of negative charge per second. What is the net current from A to B?
A) 8.0 A
B) −8.0 A
C) 4.0 A
D) −4.0 A
E) 12 A

Question

Quizplus · Accepted Answer

The net current is the sum of the currents due to positive and negative charges. Positive ions carry 6.0 A from A to B, and negative ions effectively carry 2.0 A in the opposite direction, which is equivalent to adding 2.0 A from A to B, making the total current 8.0 A from A to B.

In a Liquid, a Current Is Set Up Between Points