The wire of length L and resistance R is stretched so that its radius of cross-section is halved. What is its new resistance?
A. 5R
B. 8R
C. 4R
D. 16R
Answer:D
The wire of length L and resistance R is stretched so that its radius of cross-section is halved. What is its new resistance?
A. 5R B. 8R C. 4R D. 16R