“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
Explain electrostatics of conductors. Explain the effects produced inside a metallic conductor placed in an external electric field.
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A hollow conducting sphere is placed in an electric field produced by a point charge placed at $P$ as shown in figure. Let ${V_A},{V_B},{V_C}$ be the potentials at points $A,B$ and $C$ respectively. Then
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Obtain the relation between electric field and electric potential.
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‘The interior of a conductor can have no excess charge in the static situation’. Explain.
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If some charge is given to a solid metallic sphere, the field inside remains zero and by Gauss's law all the charge resides on the surface. Now, suppose that Coulomb's force between two charges varies as $1 / r^{3}$. Then, for a charged solid metallic sphere
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- [KVPY 2017]