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प्रश्न
(a) Sketch a graph to show the change in potential difference across the ends of an ohmic resistor and the current flowing in it. Label the axes of your graph.
(b) What does the slope of the graph represent?
आकृति
लघु उत्तरीय
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उत्तर
(a) For an ohmic resistor, plot current (I) on the horizontal axis and potential difference (V) on the vertical axis. The graph is a straight line through the origin:
(b) The slope of this (V)-versus-(I) graph represents the resistance:
\[\text{slope}=\frac{\Delta V}{\Delta I}\]
= R
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