The ratio of radii of two wires of same material is `2 : 1.` If they are stretched by the same force, the ratio of their stress is

Explanation

stress`=("force")/("area")=F/(pir^(2))`
`implies(("stress")_(1))/(("stress")_(2))=F/(pir_(1)^(2))xx(pir_(2)^(2))/R=[(r_(2))/(r_(1))]^(2)=[1/2]^(2)=1/4`