Question

Q. 4) The resistivity of nichrome is 10-6 m. The wire
of this material has radius of 0.1mm with ne-
sistance 100 ohm them the length will be​

Answer 1

Use the Formula mentioned under

$r = p \frac{l}{a}$

where r = resistance of wire

p= resistivity of wire

l = length of wire

a= area of cross section of wire