Question

In a uniform electric field $E$, a dielectric in the form of a sphere is introduced. How will the electric field intensity at points $A,B$ and $C$ changes?

• A. Electric field at $A$ will increase.
• B. Electric field at $B$ will decrease.
  
• C. Electric field at $C$ will increase.
• D. Electric field at all points will remain the same.
  

Answer 1

Answer: (A), (B), (C)

Electric field at $C$ will increase.

The dielectric gets polarized as shown in figure.

Induced charges will also contribute to electric field.
So, the electric field intensity at points $A$ and $C$ will increase and at $B$, it will decrease.