Answer: a non-ohmic conductor.
- A a non-ohmic conductor
- B a superconductor
- C an ideal resistor
- D an ohmic conductor
Correct answer: A. a non-ohmic conductor
Explanation: Ohm's law is not universal. Materials and devices whose V-I graph is not a straight line through the origin are called non-ohmic (e.g. diodes, transistors, thermistors).
In series, the same current flows through both resistors; in parallel, the current splits between branches and the voltage across each resistor is the same.
Concept context
Ohm's law, resistors, Kirchhoff's laws, Wheatstone bridge, and cells.