Q144 / 180 · KCET 2017 · Physics

Of the following graphs, the one that correctly represents the I−V. characteristics of a ‘Ohmic device’ is

  • A
    Figure
  • B
    Figure
  • Correct answer
    C
    Figure
  • D
    Figure

Solution

Ohmic devices obey ohm's law \(\mathrm{V}=\mathrm{IR}\) where \(\mathrm{R}\) is constant. \(\Rightarrow \mathrm{I} \propto \mathrm{V}\) Thus I-V characteristics is a straight line having a non-zero slope passing through origin.

Hence, the correct answer is option: 'C'.

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