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3. current electricity — Physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 SciencePhysics3. current electricity1 Mark
MCQ
In an experiment, a graph was plotted of the potential difference $V$ between the terminals of a cell against the circuit current $i$ by varying load rheostat. Internal conductance of the cell is given by
  • A
    $xy$
  • ✓
    $\frac{y}{x}$
  • C
    $\frac{x}{y}$
  • D
    $(x -y)$
✓

Answer

Correct option: B.
$\frac{y}{x}$
b
(b) Here internal resistance is given by the slope of graph i.e. $\frac{x}{y}$. But conductance $ = \frac{1}{{{\rm{Resistance }}}} = \frac{y}{x}$

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