PhysicsEasy148×since 2002Q7942The length of a metal wire is l₁, when the tension in it is T₁ and is l₂ when the tension is T₂. The natural length of the wire is :Al1l2\sqrt {{l_1}{l_2}}l1l2Bl1T2−l2T1T2−T1{{{l_1}{T_2} - {l_2}{T_1}} \over {{T_2} - {T_1}}}T2−T1l1T2−l2T1Cl1T2+l2T1T2+T1{{{l_1}{T_2} + {l_2}{T_1}} \over {{T_2} + {T_1}}}T2+T1l1T2+l2T1Dl1+l22{{{l_1} + {l_2}} \over 2}2l1+l2Check answerSkip