Physics
A transformer

Converts electrical energy into mechanical energy
Converts AC voltage to D.C. voltage
Converts DC to AC
Is used to decrease or increase AC voltage

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Physics
Rain drops fall from great height. Which among the following statements is true regarding it?

Their velocity increases and they fall with different velocity on the earth
They fall with that ultimate velocity, which are different for different droplets
Their velocity increases and they fall with same velocity on the earth
They fall with same ultimate velocity

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