A five wire potentiometer is connected to an accumulator of e.m.f 2.2 V and 1Omega internal resistance. The potentiometer wire has resistance 1Omega per metre. What is the maximum voltage that you can measure with this particular arrangement of potentiometer? What length of this potentiometer will balance the e.m.f of a daniell cell (e.fm.f =1.18V)? what resistance to balance this cell exactly at the centre of the last wire?

A five wire potentiometer is connected to an accumulator of e.m.f 2.2

1.	A five wire potentiometer is connected to an accumulator of e.m.f 2.2 V and 1Omega internal resistance. The potentiometer wire has resistance 1Omega per metre. What is the maximum voltage that you can measure with this particular arrangement of potentiometer? What length of this potentiometer will balance the e.m.f of a daniell cell (e.fm.f =1.18V)? what resistance to balance this cell exactly at the centre of the last wire?
Answer» SOLUTION :put `R_(1)=1018` (one thousand times the e.m.f of Cd-cell), adjust `R_(2)` till no deflection in the GALVANOMETER `R_(2)=972Omega,5.1m)`

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