“Electric field inside hollow region of conductor in uniform electric field is same”. Explain.
“Electric field inside hollow region of conductor in uniform electric field is same”. Explain.
Consider a conductor with a cavity as shown in figure.
There is no charges inside the cavity.
Whatever be the size and shape of the cavity.
If a conductor with cavity placed in external electric field, its electric field in cavity remain zero.
If the conductor is charged or charges are induced on a neutral conductor by an external field, all charges reside only on the outer surface of a conductor with cavity.
Any cavity in a conductor remains shielded from outside electric influence. This is known as electrostatic shielding.
When we are in the car and there is thunder with lighting in the sky, we should closed all doors of the car. If lighting strikes the car, (or live current wire falls on car) electrostatic shielding develops on the outer surface of the car and we are safe inside the car.
Similar Questions
An empty thick conducting shell of inner radius $a$ and outer radius $b$ is shown in figure.If it is observed that the inner face of the shell carries a uniform charge density $-\sigma$ and the surface carries a uniform charge density $ '\sigma '$
If a point charge $q_A$ is placed at the center of the shell, then choose the correct statement $(s)$
An empty thick conducting shell of inner radius $a$ and outer radius $b$ is shown in figure.If it is observed that the inner face of the shell carries a uniform charge density $-\sigma$ and the surface carries a uniform charge density $ '\sigma '$
If a point charge $q_A$ is placed at the center of the shell, then choose the correct statement $(s)$
For a spherical shell
For a spherical shell
A spherical portion has been removed from a solid sphere having a charge distributed uniformly in its volume in the figure. The electric field inside the emptied space is
A spherical portion has been removed from a solid sphere having a charge distributed uniformly in its volume in the figure. The electric field inside the emptied space is
Obtain the relation between electric field and electric potential.
Obtain the relation between electric field and electric potential.
Two charged spherical conductors of radius $R_{1}$ and $\mathrm{R}_{2}$ are connected by a wire. Then the ratio of surface charge densities of the spheres $\left(\sigma_{1} / \sigma_{2}\right)$ is :
Two charged spherical conductors of radius $R_{1}$ and $\mathrm{R}_{2}$ are connected by a wire. Then the ratio of surface charge densities of the spheres $\left(\sigma_{1} / \sigma_{2}\right)$ is :
- [NEET 2021]