Question

wire is made to stretch two times of its initial diameter if initial resistance is 32 ohm.Calculate the new resistance​

Answer 1

Answer:

8 ohm

Explanation:

Resistance is inversely proportional to the square of the diameter

Answer 2

Explanation:

R= L/A

R= 1/D²

R1= 1/D²1 .......1

R2= 1/D²2.....2

R1/R2 = D²2/D²1

32/R2 = (2D)²/D²

32/R2 = 4

R2 = 32/4 = 8 ohm