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1
1e has charge of 1.602 X 10-19 C
So, 9.109 X 10-31 kg has 1.602 X 10-19 C
So, 1 Kg has = 1.602 X 10-19/(9.109 X 10-31) C
2
Kq1q2/r2 = mv2/r Here we need one more equation as there are two variables and only one equation. Or, assumne mvr= nh/2 and then solve.
T= 2r/v
3
Electric field inside a uniformly charged dielectric sphere is NOT zero. It is zero inside a metallic sphere or any metal.
Electric field inside a uniformly charged dielectric sphere is = kqr/R3
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