If three resistors in the various configurations shown are placed in a simple circuit, the configuration in which all three resistors carry the same current is
A) 1
B) 2
C) 3
D) 4
E) 5

Question

If three resistors in the various configurations shown are placed in a simple circuit, the configuration in which all three resistors carry the same current is
A) 1 
B) 2 
C) 3 
D) 4 
E) 5

Quizplus · Accepted Answer

In configuration 3, all three resistors are in parallel, so they have the same voltage drop across them. By Ohm's Law, V = IR, and since the voltage drop is the same across all three resistors, the one with the smallest resistance (R) will have the largest current (I). Therefore, all three resistors are carrying the same current in configuration 3.

If Three Resistors in the Various Configurations Shown Are Placed