A uniform metal rod is used as a bar pen...

A uniform metal rod is used as a bar pendulum. If the room temperature rises by `10^(@)C`, and the coefficient of linear expansion of the metal of the rod is `2 xx 10^(-6) per^(@)C`, the period of the pendulum will have percentage increase of

`-2xx10^-3`

`-1xx10^-3`

`2xx10^-3`

`1xx10^-3`

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