Telangana Police SI 2018 · Question 31 of 96

Identify the correct statement:

physics

AThe resistance of a metallic conductor depends on the potential difference across the conductor.
BThe resistance of a metallic conductor depends upon the direction of the current in the conductor.
CThe resistance of a metallic conductor depends on the length of the conductor.Correct
DThe resistance of a metallic conductor is independent of the temperature of the conductor.

Answer: C. The resistance of a metallic conductor depends on the length of the conductor.

Explanation

[2018 PWT Q106] R = rho*L/A, so resistance depends on length. It does not depend on potential difference or current direction, and it does vary with temperature. Verified against the official TSLPRB preliminary key (Booklet D).

Source: TS SI PWT 2018 official paper (Booklet D); answer cross-verified with the official TSLPRB preliminary key

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