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JEE Main Physics Class 12 Electrostatic Potential and Capacitance Part 1 Questions
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© examsnet.com
Question : 60
Total: 100
Assume that an electric field
→
E
=
30
x
2
^
i
exists in space. Then the potential difference
V
A
−
V
O
,
where
V
O
is the potential at the origin and
V
A
the potential at
x
=
2
m
is:
[2014]
120 J/C
–120 J/C
–80 J/C
80 J/C
Validate
Solution:
Potential difference between any two points in an electric field is given by,
d
V
=
−
→
E
.
→
d
x
V
A
∫
V
O
d
V
=
−
2
∫
0
30
x
2
d
x
V
A
−
V
O
=
−
[
10
x
3
]
0
2
=
−
80
J
∕
C
© examsnet.com
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