Question

Resistance connected parallel to the potentiometer os increased how will ot change the balancing length

Answer 1

Answer:

Solution:

Let us Consider a cell of emf E and balancing length l1

E=kl1

potential difference is balanced by length l2.

V=kl2

Internal resistance of the cell

r=(E−VV)R=(EV−1)R=(l1l2−1)R

=(560560−60−1)10=(5650−1)10

=65=1.2Ω