Can i change the voltage of a battery form 9 volts to 2 volts using a rheostat.?

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  • 6 years ago
    Favourite answer

    No. A rheostat iscommonly drawn with 2 terminals - a variable resistor. You'd need 3 terminals - a potentiometer - which would give you a controlled voltage at low current (compared to the current, and hence power wasted, flowing through the pot). Unless your load was a fixed resistance, in which case you'd have a potential divider using a rheostat and the load.

    Nowadays everyone uses dc-dc converters which are cheap, small, efficient, don't get hot and give a more accurate voltage under different load conditions.

  • JOS J
    Lv 7
    6 years ago

    Yes

  • Anonymous
    6 years ago

    yes

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