7.3 current in series and parallel circuits

Question 1

Why are ammeters good to use to measure current in a circuit

Answer 1

They have low resistance so they do not affect the current that they are measuring

Question 2

In series why is the current the same

Answer 2

It is the same because the rate at which electrons leave a component must be the same as the rate at which the electrons entered the component. if this was not the case, electrons would be lost which would contradict the principle of conservation of charge