The Total solution for NCERT class 6-12
A conducting sphere ofradius 10 cm has an unknown charge. If the electric field 20 cm from the centreof the sphere is 1.5 × 103 N/Cand points radially inward, what is the net charge on the sphere?
Electric field intensity (E) at a distance (d)from the centre of a sphere containing net charge q isgiven by the relation,
Where,
q = Net charge = 1.5 × 103 N/C
d = Distance from the centre = 20 cm = 0.2 m
∈0 = Permittivity offree space
And, = 9 × 109 N m2 C−2
= 6.67 × 109 C
= 6.67 nC
Therefore, the net chargeon the sphere is 6.67 nC.