Question

Resistivity of
2 metals iron & silver are l0x10^-8 ohm meter and
16 X10^-8 ohm meter respectively, & having same thickness if the
Length
of
silver rod is 20cm then the
Length of
of iron rod is
a.10cm
b. 200cm & c.32cm d] 8 cm.
​

Answer 1

Answer:

Explanation:

R = ρ l/A

R α l

l0x10^-8  / 16 X10^-8 = Length of of iron rod/ 0.2

Length of of iron rod = 0.625*0.2

= 0.125 m

= 12.5 cm