Assume a solid conductor is placed next to a negatively charged sphere. This causes the surface of the conductor near the sphere to become positively charged so that the net electric field inside the conductor is zero. Now we cut a hole so that it is entirely encased by the conductor. a. Does removing part of the inside of the conductor affect the electric field? cross-section of 3D сonductor b. What is the electric field inside the hole?
In case of a solid conductor or solid conducting shell whole charge resides at the surface.
for example if a charge of +q given to solid conductor then the whole charge gets uniformly distributed over the surface area.
this is because it's a property of the conductor.
(a) Inside the space of solid conductor electric field is zero. when a negative charge brought near its surface, equal amount of positive and negative charge induces in conductor which cancal out the effect of external electric field.
so removing part does not affect the electric field. It still remain zero inside solid surface.
(b)electric field inside hole or cavity is zero because induced electric field inside conductor will be equal and opposite to external electric field due to negative charge outside.
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