Physics · Ohm's law, electrical resistance, I-V characteristics of Ohmic and non-ohmic conductors
The graph between potential difference and current for a conductor is a straight
The graph between potential difference and current for a conductor is a straight line passing through the origin. Which law is illustrated by such a graph?
- A. Law ofcombination of resistances
- B. Henry's law
- C. ohm'slaw
- D. Joule's law ofheating
Step-by-step solution
Ohm's law states that the potential difference (V) across a conductor is directly proportional to the current (I) through it, provided physical conditions remain constant. Mathematically, V = IR, where R is constant resistance. This relationship yields a straight line passing through the origin when V is plotted against I. The other options are incorrect: Law of combination of resistances deals with series/parallel circuits, Henry's law relates to gas solubility, and Joule's law of heating describes heat produced by current.
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