Two metal wires P and Q of same length a...

Two metal wires P and Q of same length and material are stretched by same load. Yheir masses are in the ratio `m_(1):m_(2)`. The ratio of elongation of wire P to that of Q is

`m_1^2:m_2^2`

`m_2^2:m_1^2`

`m_2:m_1`

`m_1 : m_2`

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