effect of current on resistance in series

Question

effect of current on resistance in series graphical explaination

 

Answer 1

When resistors are in series in an electric circuit, the currents flowing through the resistors are the same.  Think of it as a chain of resistors, with no branching off.  The current that enters the first resistor exits in full, then enters the next resistor, an so forth, until it enters and exits the last resistor, in full.  

 

Given resistors R₁, R₂, R₃, ... in series, and the same current I flowing through all, then by Ohm's law, the total voltage drop across the series is

 

IR₁ + IR₂ + IR₃ + ... = I(R₁ + R₂ + R₃ + ...)