Two tiny spheres carrying charges 1.5 microcoloumb 2.5 microcoloumb are located 30 cm apart. Find the potential V and electric field: (a) at the mid-point of the line joining the two charges, and (b) at a point 10 cm from this mid-point in a plane normal to the line and passing through the mid-point.
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вrαínlíєѕt mє
Two charges placed at points A and B are represented in the given figure. O is the mid-point of the line joining the two charges.
Magnitude of charge located at A, q
1
=1.5μC
Magnitude of charge located at B, q
2
=2.5μC
Distance between the two charges, d=30cm=0.3m
(a)
Let V
1
and E
1
are the electric potential and electric field respectively at O.
V
1
= Potential due to charge at A + Potential due to charge at B
V
1
4π∈
0
(
2
d
)
q
1
+
4π∈
0
(
2
d
)
q
2
=
4π∈
0
(
2
d
)
1
(q
1
+q
2
)
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