SSC JE Electrical Engineering 22 Jan 2018 Morning Paper

Question : 102 of 200

Marks: +1, -0

Which one of the following statement is TRUE about the resistance of a conductor?

The resistance of a conductor is inversely proportional to the length of the conductor.
The resistance of a conductor is directly proportional to the area of the conductor.
The resistance of a conductor is inversely proportional to the pressure applied on the conductor.
The resistance of a conductor is inversely proportional to the area of the conductor.

Solution:

Resistance of conductor is given by formula R

=ρ l/A

where ρ → resistivity of material
l → length of conductor
ad A → Cross sectional Area of conductor
Hence

R∝1/A

⇒ resistance is inversely proportional to area of conductor

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