Question

What is the voltage difference if the current is 1mA and length and area is 2cm and 4cm2 respectively?(ρ=2Ωm)

(a) 0.025V

(b) 25V

(c) 0.25V

(d) None

This question was addressed to me in a job interview.

The origin of the question is Conductivity of a Semiconductor topic in division Conduction in Semiconductors of Electronic Devices & Circuits

Answer 1

Right option is (d) None

For explanation I would say: V=IR

R=ρl/(A)=2*2/4=100Ω

V=1mA*100

=0.1V.