A Gaussian surface in the figure is shown by dotted line. The electric field on the surface will be [2004]

Question

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(4)

The flux through the Gaussian surface is due to the charges inside the Gaussian surface. But the electric field on the Gaussian surface is the vector sum of the electric fields due to all the charges, i.e., $q_{1}, - q_{1}$ and $q_{2}$ .

Solution

Q.
A Gaussian surface in the figure is shown by dotted line. The electric field on the surface will be [2004]

1 due to $q_{1}$ and $q_{2}$ only

2 due to $q_{2}$ only

3 zero

4 due to all

Ans.
(4)

The flux through the Gaussian surface is due to the charges inside the Gaussian surface. But the electric field on the Gaussian surface is the vector sum of the electric fields due to all the charges, i.e., $q_{1}, - q_{1}$ and $q_{2}$ .

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Solution

Q. A Gaussian surface in the figure is shown by dotted line. The electric field on the surface will be [2004]

1 due to q1 and q2 only

2 due to q2 only