For a spherical shell of radius R which carries a uniform surface charge, (A) both the field and the potential inside the shell are non-zero (B) both the field and the potential inside the shell are zero (C) the field inside the shell is non-zero while potential inside the shell is zero (D) the field inside the shell is zero while potential inside the shell is non-zero
spherically shell are used for shielding i.e. field inside the shell always zero because there Isn't any charge distribution inside the shell so field is always zero but potential ...