Which among the following does not affect the resistance of a wire?

Cross-sectional area

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Material

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Length

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Colour

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Solution

The correct option is D Colour
Resistance of an ohmic conductor is given by:
$R = ρ \frac{L}{A}$
where:
$ρ :$ Resistivity- An intrinsic property of the material. It may be noted that resistivity increases with temperature.
$L :$ Length of the conductor
$A :$ Cross section area of the conductor

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Which among the following does not affect the resistance of a wire?

The correct option is D ColourResistance of an ohmic conductor is given by: R=ρLA where: ρ: Resistivity- An intrinsic property of the material. It may be noted that resistivity increases with temperature. L: Length of the conductor A: Cross section area of the conductor

The correct option is D Colour
Resistance of an ohmic conductor is given by:
$R = ρ \frac{L}{A}$
where:
$ρ :$ Resistivity- An intrinsic property of the material. It may be noted that resistivity increases with temperature.
$L :$ Length of the conductor
$A :$ Cross section area of the conductor