- #1
tin llenaresas
- 18
- 0
in measuring unknown emf by potentiometer, why must the stable current source(working battery) have a voltage greater than any voltage to be measured?
i can't understand why..
in our exercise in physics, we used a slide-wire potentiometer with the assumption that 1 meter of the slide-wire gives a voltage drop of 1V. so, the battery we used has an emf slightly greater than 2 volts.
is there a connection between the length of the slide wire used and the use of a battery with an emf greater than 2V?
i am currently doing our physics lab report and honestly, its part of the discussion. I am asking for help for i can't understand.
tanx to anybody who dares to reply..
i can't understand why..
in our exercise in physics, we used a slide-wire potentiometer with the assumption that 1 meter of the slide-wire gives a voltage drop of 1V. so, the battery we used has an emf slightly greater than 2 volts.
is there a connection between the length of the slide wire used and the use of a battery with an emf greater than 2V?
i am currently doing our physics lab report and honestly, its part of the discussion. I am asking for help for i can't understand.
tanx to anybody who dares to reply..