Question

For a metallic wire, the ratio V/I ______

(V = the applied potential difference, I = current flowing)

Options

• is independent of temperature.

• increases as the temperature rises.

• decreases as the temperature rises.

• increases or decreases as temperature rises, depending upon the metal.

Answer 1

For a metallic wire, the ratio V/I increases as the temperature rises.

Explanation:

As `"V"/"I" = "R"` and R ∝ temperature.