Which of the following graphs best represents the current-voltage relationship for a device that obeys Ohm's law?
A) I
B) II
C) III
D) IV
E) V

Question

Which of the following graphs best represents the current-voltage relationship for a device that obeys Ohm's law? 
A) I 
B) II 
C) III 
D) IV 
E) V

Quizplus · Accepted Answer

Ohm's law states that the current passing through a conductor between two points is directly proportional to the voltage across the two points. This means that as the voltage increases or decreases, the current through the device also increases or decreases in a linear relationship. Graph II shows a linear relationship between current and voltage, indicating a device that obeys Ohm's law. The other graphs show non-linear relationships between current and voltage, which do not follow Ohm's law.

Which of the Following Graphs Best Represents the Current-Voltage Relationship