All the positive terminals of sources of emf are joined at point A of potentiometer, where the given primary cell - Physics - Current Electricity

Question

All the positive terminals of sources of emf are joined at point A
of potentiometer, where the given primary cell is connected whose
internal resistance is to be measured But if all the negative
terminals of sources of emf are joined at point A then how will the
balance length be affected?

Vara · Accepted Answer

Dear
Student,
Please find below the solution
to the asked query:

If all negative terminals are connected together to point A,
then emfs of primary and secondary circuits will be added up no
null point or balanced point is obtained
As a result, the deflection of galvanometer always shows
reading in a single direction

Hope this information will
clear your doubts about
Galvanometer
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All the positive terminals of sources of emf are joined at point A of potentiometer, where the given primary cell is connected whose internal resistance is to be measured. But if all the negative terminals of sources of emf are joined at point A then how will the balance length be affected?