Question

Figure 20.17 shows a spherical Gaussian surface and a charge distribution. When calculating the flux of electric field through the Gaussian surface, the electric field will be due to

• A. $+q_{3}alone$
• B. $+q_{1}and+q_3$
• C. $+q_1,+q_{3}and-q_2$
• D. $+q_1,and-q_2$

Answer 1

The correct option is C

$+q_1,+q_{3}and-q_2$

The electric flux is given by the surface integral $\int$ E.ds. Here the electric field E is due to all the charges, both inside and outside the Gaussian surface. Hence the correct choice is (c)