An electric point charge q = 6uC is placed at
origin of x - y Co-ordinate axis. Calculate
electric potential due to the charge at point
P(12m, 16m) in free space.
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Answer:
Let P
1
and P
2
be the points where electric potential is zero.
At point P
1
:
V
P
1
=
y
1
kq
1
+
(100−y
1
)
kq
2
=0
∴
y
1
2
+
(100−y
1
)
(−3)
=0
OR
y
1
2
=
(100−y
1
)
3
⟹ y
1
=40 cm
At point P
2
:
V
P
2
=
y
2
kq
1
+
(y
2
+100)
kq
2
=0
∴
y
2
2
+
(100+y
2
)
(−3)
=0
OR
y
2
2
=
(100+y
2
)
3
⟹ y
2
=−200 cm
Thus electric potential is zero at y=40cm and y=−200cm.
Explanation:
I hope you can understand by this example
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