MHTCET 2016 Physics Solved Paper

(a) Clearly from figure,

Balancing length x

x

L

=

V

V0

⇒ x=

V×L

V0

here, V0 = potential difference across potentiometer wire
V = potential to be measured
L = length of the potentiometer wire
∵ x ∝ L
∴ if length of potentiometer wire is increased the balancing length will also increases.