a uniformly charged sphere has total charge of 300 micro cullomb and a radius of 8 cm. find the electric intencity at a point 16 cm away from the centre of the sphere.
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Answer:
Total charge =Q
radius =R
Potential difference =ΔV
ΔV=∫E.ds
=∫
r
2
Kθ
dr
=KQ∫
r
2
dr
=KQ∫r
−2
dr
=KQ
−2+1
r
−2+1
=−KQ
2r
1
where radius =R
=
2R
−KQ
.
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