An experiment performed on a metallic conductor yielded the best-fit equation V=2.00I+0.05 (with V in volts and I in amperes) for currents up to 1.5A. Which of the following conclusions is most appropriate?
(a) R=0.50Ω; the conductor appears to obey Ohm’s law because voltage is proportional to current.
(b) R=2.5Ω; the extra 0.05V increases the effective resistance slightly, but the conductor is still ohmic.
(c) R=2.0Ω; the small intercept indicates a systematic error, so the conductor obeys Ohm’s law within experimental limits.
(d) R=2.0Ω; the conductor strictly obeys Ohm’s law with no systematic error whatsoever.