In a potentiometer arrangement, a cell of $emf$ $1.25\,V$ gives a balance point at $35.0\,cm$ length of the wire. If the cell is replaced by another cell and the balance point shifts to $63.0\,cm,$ the $emf$ of the second cell ............... $V$
Medium
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$E\, \propto \,l$
$emf$ of cell $=\frac {63}{35}\,\times 1.25=2.25\,volt$
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