Correct option is A
The correct answer is: (A) same
Explanation:
The resistivity of a conductor is a material property that depends only on the type of material and temperature, not on its shape or size.
The resistivity of a conductor is a material property that depends only on the type of material and temperature, not on its shape or size.
Therefore, if the cross-sectional area of the conductor is doubled while keeping other factors constant (such as the material and temperature), the resistivity of the conductor remains unchanged.
Information Booster:
Resistivity (denoted by ρ) is a material property that measures how strongly a material opposes the flow of electric current.
The formula for resistance shows that while the cross-sectional area AA affects the resistance, the resistivity ρ\rhoρ remains constant for a given material.
Resistivity only changes if the material itself changes or if there is a significant change in temperature.
Resistivity is measured in ohm meters (Ω·m), and it helps in determining how easily current can flow through a given material.
Example: Copper, having low resistivity, allows easy current flow, while rubber, with high resistivity, resists current flow.
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