Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. A 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 ?
$(\frac {1}{4\pi \epsilon_o} = 9 \times 10^9 Nm^2/C^2)$

NEETNEET 2020Electric Charges and Fields

Solution:

Electric field outside a conducting sphere
$E=\frac{1}{4\pi\varepsilon_{0}} \frac{Q}{r^{2}}$
$=\frac{9\times10^{9}\times3.2\times10^{-7}}{225\times10^{-4}}$
$=0.128\times10^{6}$
$=1.28\times10^{5} N /C$