Question

In the given question, a statement of Assertion $\left(A\right)$ is given, followed by a corresponding statement of Reason $\left(R\right)$ just below of it. Mark the correct answer.

Assertion$\left(A\right)$ : Four point charges $q_1,q_2,q_3\text{and}{q}_4$ are as shown in figure. The flux over the shown Gaussian surface depends only on charges $q_1\text{and}{q}_2$

Reason$\left(R\right)$ : Electric field at all points on Gaussian surface depends only on charges $q_1\text{and}{q}_2$

• A. Both $\left(A\right)$ and $\left(R\right)$ are true and $\left(R\right)$ is the correct explanation of $\left(A\right)$
• B. Both $\left(A\right)$ and $\left(R\right)$ are true and $\left(R\right)$ is not the correct explanation of $\left(A\right)$
• C. $\left(A\right)$ is true and $\left(R\right)$ is false
• D. $\left(A\right)$ is false and $\left(R\right)$ is true

Answer 1

The correct option is C $\left(A\right)$ is true and $\left(R\right)$ is false

From Gauss's law, net flux through any closed surface is directly proportional to net charge enclosed by the surface. But electric field at any point on the Gaussian surface depends on all the charges near the vicinity.

Hence, the assertion is true, but the reason is false.

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Hence, $\left(C\right)$ is the correct answer.