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MHT CET 2016 Physics Solved Paper
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© examsnet.com
Question : 1
Total: 50
In potentiometer experiment, null point is obtained at a particular point for a cell on potentiometer wire x cm long. If the length of the potentiometer wire is increased without changing the cell, the balancing length will (Driving source is not changed)
increase
decrease
not change
become zero
Validate
Solution:
(a) Clearly from figure,
Balancing length x
x
L
=
V
V
0
⇒
x
=
V
×
L
V
0
here,
V
0
= 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.
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