Question

Please give answerrrrr and explaination

Answer 1

Question :

Which of the following graphs shows the variation of electric field E due to a hollow spherical conductor of radius R as a function of distance from the centre of the sphere.

Solution :

❖ Electric field intensity due to uniformly charged hollow conducting / non-conducting / solid conducting sphere is given by

(i) For r ≥ R, $\underline{\boxed{\bf{\purple{\overrightarrow{E}=\dfrac{KQ}{|\overrightarrow{r}|^2}\hat{r}}}}}$

(ii) For r < R, $\underline{\boxed{\bf{\gray{E=0}}}}$

Note :

• R is radius of the sphere.

• $\sf\overrightarrow{r}$ is vector drawn from centre of sphere to the point.

• Sphere acts like a point charge placed at centre for points outside the sphere.

• $\sf\overrightarrow{E}$ is always along radial direction.

• Q is the total charge.

(A) is the correct answer!

Knowledge BoosteR :

• Electric field is the region around charged particle or charged body in which if another charge is placed, ot experiences electrostatic force.
• It is a vector quantity. Its direction is the same as the force experienced by positive charge.
• Direction of electric field due to positive charge is always away from it while due to negative charge always towards it.