A conductor is tested by measuring the current for different applied voltages at a fixed temperature. The readings obtained are:
Voltage (V): 1, 2, 3, 4, 5
Current (A): 0.5, 1.0, 1.5, 1.7, 1.8
Up to which applied voltage can the conductor be said to obey Ohm’s law?
a) 4V
b) 2V
c) 3V
d) 5V