1.

Consider an evacuted cylindrical chamber of height h having rigid conducting plates at the end and an insulting curved surface as shown in the figure. A number of spherical balls made of a light weight and soft material and coated with a conducting material are placed on the bottom plated. The balls have a radius r

Answer»

The balls will stick to the TOP plate and remain there
The balls will bounce back to the BOTTOM plate carrying the same CHARGE they WENT up with
The balls will bounce back to the bottom plate carrying the opposite charge they went up with
The balls will execute SIMPLE harmonic motion between the two plates

Answer :C


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