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JEEMAIN and NEET
>>
Physics
>>
Class12
>>
Experimental Skills in Physics
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Q)
Potentiometer wire is of cross sectional area
8
×
10
−
6
m
2
and has resistivity
40
×
10
−
8
. If
0.2
amp current flows through it its potential gradient is
(
a
)
10
−
2
v
/
m
(
b
)
2
×
10
−
2
v
/
m
(
c
)
10
−
3
v
/
m
(
d
)
3
×
10
−
3
v
/
m
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