. Unlike charges each of 1000 u C are separated in air by 2 m. Calculate the electric field at the centre of the line joining them, and at a point at equal distances of 4 m from each charge.
Answers
Explanation:
1/3m from −2μC
Let potential is zero at a distance x from 4μc
⇒
x
k(4)
+
(1−x)
k(−2)
=0
⇒
x
4
=
(1−x)
2
⇒2−2x=x
⇒2=3x
⇒x=
3
2
∴ from the distance is 1−
3
2
=
3
1
potential is zero at
3
1
m from −2μc.
Hence,
option (C) is correct answer.
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