Copper wire of certain length and resistance is drawn out to three times its length without change in volume, the new resistance of wire becomes
A. 1/9 times
B. 3 times
(e) 9 times
D. unchanged
Answer: C
Copper wire of certain length and resistance is drawn out to three times its length without change in volume, the new resistance of wire becomes
A. 1/9 times
B. 3 times
(e) 9 times
D. unchanged
Answer: C