Can i change the voltage of a battery form 9 volts to 2 volts using a rheostat.?
- adavielLv 76 years agoFavourite 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 JLv 76 years ago
- Anonymous6 years ago