NEET-XII-Physics
neet 2020 questions with solutions year:2020
- #16A spherical conductor of radius 10cm has a charge of `` 3.2 \times 10^{-7} C `` distributed uniformly. What is the magnitude of electric field at a point `` 15\,cm `` from the centre of the sphere ?
`` (\frac {1}{4\pi \epsilon_o} = 9 \times 10^9 Nm^2/C^2) ``
(A) `` 1.28 \times 10^4\,N/C ``
(B) `` 1.28 \times 10^5\,N/C ``
(C) `` 1.28 \times 10^6\,N/C ``
(D) `` 1.28 \times 10^7\,N/C ``
digAnsr: BAns : Electric field outside a conducting sphere
`` E=\frac{1}{4\pi\varepsilon_{0}} \frac{Q}{r^{2}} ``
`` =\frac{9\times10^{9}\times3.2\times10^{-7}}{225\times10^{-4}} ``
`` =0.128\times10^{6} ``
`` =1.28\times10^{5} N /C ``