PhysicsNEET 2020Electric flux and Gauss's law with applications

Electric Charges and Fields

A spherical conductor of radius 10 cm has a charge of $3.2 \times 1 0^{- 7}$ C distributed uniformly. What is the magnitude of the electric field at a point 15 cm from the centre of the sphere? ( $\frac{1}{4 π ε _{0}} = 9 \times 1 0^{9} N m^{2} C^{- 2}$ )

A. $1.28 \times 1 0^{4}$ N/C
B. $1.28 \times 1 0^{5}$ N/C✓
C. $1.28 \times 1 0^{6}$ N/C
D. $1.28 \times 1 0^{7}$ N/C

You have the answer. The worked solution — and why the other three were written — is part of a paid pack.

Electric Charges and Fields

More from this chapter in past papers