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Question
The relationship between the potential difference and the current in a conductor is stated in the form of a law.
- Name the law.
- What does the slope of V-I graph for a conductor represent?
- Name the material used for making the connecting wire.
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Solution
(i) Ohm’s law.
(ii) For a graph of potential difference against current, the slope represents resistance:
\[\text{slope}=\frac{\Delta V}{\Delta I}=R\]
(iii) Copper is commonly used for connecting wires because it is a good conductor.
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