1.

Statement-1: When a wire is stretched with in the proportionality limit such that its length becomes n times that of its initial value, the resistance of wire may become n^(2) times of its initial resistance Statement-2: The poisson's ratio of the wire's material can be 1//2.

Answer»

STATEMENT-1 is true, statement-2 is true and statement-2 is CORRECT explanation for statement-1.
Statement-1 is true, statement-2 is true and statement-2 is NOT the correct explanation for statement-1.
Statement-1 is true, statement-2 is false.
Statement -1 is false, statement -2 is true.

Solution :`R=(rhol)/A=(rhol^(2))/((AL))` is volume is constant V=const. Þ A1=constÞ r^(2)1=const.
`Rightarrow (2Deltar)/r+(Deltal)/l=0=0 `Rightarrowpoisson's ratio
`=-(Deltar//r)/(Deltal//l)=1/2`


Discussion

No Comment Found

Related InterviewSolutions