Electrostatic shielding is the phenomenon of protecting a certain region of space from:
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → External electric field
Inside a conductor with a cavity the electric field is zero, whatever the charges and fields outside, so the cavity is protected from outside electrical influences. This is electrostatic shielding.
NCERT (2026-27):
Electrostatics of Conductors – “… Whatever be the charge and field configuration outside, any cavity in a conductor remains shielded from outside electric influence: the field inside the cavity is always zero. This is known as electrostatic shielding.”