A block has dimensions 1 cm, 2cm, 3cm Ratio of the maximum and minimum resistance between any two points of opposite faces of this block is

Options

A. `9:1`
B. `1:9`
C. `18:1`
D. `1:6`

Answer

A

Explanation

`R_(max)=rho(l_(max))/(A_(min))=rho(3)/(2)`
`R_(min)=rho(l_(min))/(A_(max))=rho(1)/(6)`
`therefore (R_(max))/(R_(min))=(3)/(2)xx(6)/(1)=9:1`