Questions
At a point 20cm from the centre of a uniformly charged dielectric sphere of radius 10cm , the electric field is 100 . The electric field at 3cm from the centre of the sphere will be
detailed solution
Correct option is C
Electric field outside of the sphere Eout=kQr2 .......iElectric field inside the dielectric sphere Ein=kQxR3 .......iiFrom (i) and (ii), Ein=Eout×r2xR3 ⇒At 3 cm, E=100×3202103=120 V/m.Talk to our academic expert!
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If q is the charge per unit area on the surface of a conductor, then the electric field intensity at a point on the surface is
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