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Question
Physics
The electric potential at a point (x , y , z) is given by: V=-x2y-xz3+4 The electric field overset arrow E at that point is:-
Q. The electric potential at a point
(
x
,
y
,
z
)
is given by:
V
=
−
x
2
y
−
x
z
3
+
4
The electric field
E
→
at that point is:-
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NTA Abhyas 2020
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A
E
→
=
i
^
(
2
x
y
−
z
3
)
+
j
^
x
y
2
+
k
^
3
z
2
x
B
E
→
=
i
^
(
2
x
y
+
z
3
)
+
j
^
x
2
+
k
^
3
x
z
2
C
E
→
=
i
^
2
x
y
+
j
^
(
x
2
+
y
2
)
+
k
^
(
3
x
z
−
y
2
)
D
E
→
=
i
^
z
3
+
j
^
x
yz
+
k
^
z
2
Solution:
V
=
−
x
2
y
−
x
z
3
+
4
E
x
=
∂
x
−
∂
V
=
−
∂
x
∂
(
−
x
2
y
−
x
z
3
+
4
)
=
+
2
x
y
+
z
3
E
y
=
∂
y
−
∂
V
=
−
∂
y
∂
(
−
x
2
y
−
x
z
3
+
4
)
=
+
x
2
E
z
=
∂
z
−
∂
V
=
−
∂
z
∂
(
−
x
2
y
−
x
z
3
+
4
)
=
+
3
x
z
2
so
=
E
→
=
E
x
i
^
+
E
y
j
^
+
E
z
k
^