Assertion :A device used to measured `vec(E)` is located at some distance form a fixed point charge.In this situation ,the device measures `E_(0)` as the magnitude of electric field intensity.Now an uncharged conducting spehre with a very small hole is lowered by an insulating thread so that it surrounds the point charge .Now the reading of the device become zero.
Reason : Electrostatic sheilding is the phenomenon in which inside of hollow conductor is shielded for outside electric field

Options

A. Both `(A)` and `(R )` are true and `'R'` is the correct explanation of `A`.
B. Both `A` and `R` are true and `R` is not the correct explanation of `A`
C. `(A)` is true but `(R )` is false
D. `(A)` is false but `(R )` is true

Answer

4