Want to ask about balance condition.

Question

anonymous · Answer

do u want to know how to balance equation

anonymous · Answer

No no, in electricity context.........

anonymous · Answer

oh......

anonymous · Answer

If a sliding contact is moved to a point on a wire where the galvanometer shows null deflection, this means that no current flows through the test cell.(according to my text)
BUT I'm wondering why there'll be no current how can this be possible since it's still a closed circuit!!!!

anonymous · Answer

And this also implies there's no pd across the internal resistance (I'm like HUH?!)

anonymous · Answer

And this means tt BALANCE CONDITION is achieved. This means tt e pd acros e length of the wire equals e emf of the test cell. Therefore emf of test cell can be det by finding v when galvanometer shows null deflection(totally confused)
And the pt is known as balanced pt (hmmmm)
N length is known as balanced length (....)
HELP.
Totally lost...

anonymous · Answer

Do you have a circuit diagram you can upload for us?

anonymous · Answer

|dw:1314891760777:dw| Is it something like this?