1. A wire of 10 ohm resistance is stretched to twice its original length. What will be
its (1) new resistance (ii) new resistivity?
Answers
Answered by
0
New resistivity - Resistivity p remains unchanged because it is the property of the material of the wire.
New resistance - In both cases, the volume of the wire is the same.
V = Al
R = ρl/A
R’ = 9ρl/A = 9R
R’ = 9*10= 90Ω
Similar questions