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JEEMAIN and NEET
>>
Physics
>>
Class12
>>
Electrostatic Potential and Capacitance
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Q)
The potential at a point x due to some charges situated on the x- axis is given by
V
(
x
)
=
20
(
x
2
−
4
)
v
o
l
t
. The electric field at x = 4m is given by
(
a
)
(
10
9
)
v
o
l
t
/
m
(
ˆ
i
)
(
b
)
(
10
9
)
v
o
l
t
/
m
(
−
ˆ
i
)
(
c
)
(
5
3
)
v
o
l
t
/
m
(
ˆ
i
)
(
d
)
(
−
5
3
)
v
o
l
t
/
m
(
ˆ
i
)
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