A student records the following readings for a metallic resistor at constant temperature:

PHYSICS · Single correct · A Level · Physics · Electricity · Electricity

Problem

A student records the following readings for a metallic resistor at constant temperature: (i)

V = 2\,\text{V},\; I = 0.4\,\text{A}

(ii)

V = 5\,\text{V},\; I = 1.0\,\text{A}

Assuming the conductor remains ohmic, estimate the current when

V = 3\,\text{V}

. (a) 0.7 A (b) 0.5 A (c) 0.6 A (d) 0.8 A