Question

V-m
A 10 m long potentiometer wire has a potential
gradient of 0.0025 V/cm along its length. Calculate
the length of the wire at which null-point is obtained
for a 1.025 V standard cell. Also, find the emf of
another cell for which the null-point is obtained at
860 cm length. What maximum PD can be measured
by this potentiometer?
Please explain the procedure.​

Answer 1

Answer:

80cm

answer

v. 120.5.

.

.

.

Answer 2

Answer:

410cm,

2.15v ,

2.5 v

use

k = v/l

formula