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

`-2 xx 10^(-3)`

`-1 xx 10^(-3)`

`2 xx 10^(-3)`

`1 xx 10^(-3)`

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