Question

For a metallic wire, the ratio of voltage to corresponding current is ______.

Options

• Independent of temperature.

• increases with rise in temperature.

• increases or decreases with rise in temperature depending upon the metal.

• decreases with rise in temperature.

Answer 1

For a metallic wire, the ratio of voltage to corresponding current is increases with rise in temperature.

Explanation:

According to Ohm's law, the ratio of the voltage to the corresponding current is represented as resistance i.e.,

`"V"/l = "R"`(resistance)

For a metallic wire, with the increase in temperature the resistance also increase due to increased motion of the thermal electrons inside it.