The specific resistance of a material is the resistance of any amount of
that material at 20 degrees centigrade.
No. You have the right temperature but the rest of the answer is wrong. Remember, resistance is
determined by the length and cross-sectional area too. What this answer implies is that the resistance of a copper
wire one foot long and one inch in diameter would be the same as the resistance of a copper wire ten feet long and
two inches in diameter, and we both know that this isn't true. Specific resistance is the resistance of a particular
amount of a material at a temperature of 20 degrees centigrade. Now go back to Page 1-21A and choose the
The resistance would stay the same.
Maybe you didn't understand the question. If a conductor four inches long and one inch in diameter had a
resistance of 8 ohms and we stretched it out to 8 inches, it would be longer. Since the resistance varies directly
with the length of a conductor and we made it longer, the resistance would have to increase. Also, when we
stretched it out, its diameter decreased. Since the resistance varies inversely with the cross-sectional area and we
decreased the cross-sectional area, we caused the resistance to increase. Go back to Page 1-2A and choose