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Current Electricity
Potential Drop along a Uniform Wire
1 question, with its answer.
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A 6 volt battery is connected to the terminals of a three metre long wire of uniform thickness and resistance of 100 ohm. The difference of potential between two points on the wire separated by a distance of 50 cm will be :-The wire is uniform, so the potential drops uniformly along its length (we take the battery to have negligible internal resistance).
Potential gradient $= \dfrac{6\ \text{V}}{300\ \text{cm}} = \dfrac{1}{50}$ V/cm
Voltage across 50 cm $= \dfrac{6}{300} \times 50 = 1$ volt
So the potential difference between two points 50 cm apart is 1 V.
That is every question in Potential Drop along a Uniform Wire.
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