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Current Electricity — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsCurrent Electricity1 Mark
MCQ
Which of these relation holds good for an Ohmic conductor?
  • A
    $V-I$ relationship is non-linear.
  • ✓
    The straight$-$line $V-I$ graph pass through the origin.
  • C
    $V-I$ relationship is non-unique.
  • D
    $V-I$ relationship depends on the sign of $V$ for the same absolute value of $V.$
✓

Answer

Correct option: B.
The straight$-$line $V-I$ graph pass through the origin.

The conductors which obey $Ohm’s$ law are called Ohmic conductors. The linear relationship between voltage and current for these conductors hold good. The resistance $(\text{R}=\frac{\text{V}}{\text{I}})$is independent of the current through the conductor. The magnitude of current changes linearly with voltage. Hence the $V-I$ graph for ohmic conductors is a straight line passing through the origin.

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