Acell is balanced at \( 100 \mathrm{~cm} \) of a potentiometer wire...

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Acell is balanced at \( 100 \mathrm{~cm} \) of a potentiometer wire when the total length of the wire is \( 400 \mathrm{~cm} \). If the length of the potentiometer
\( \mathrm{P} \) wire is increased by \( 100 \mathrm{~cm} \), then the new balancing length for

W the cell will be
(a) \( 100 \mathrm{~cm} \)
(b) \( 125 \mathrm{~cm} \)
(c) \( 80 \mathrm{~cm} \)
(d) \( 250 \mathrm{~cm} \)
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