How can we protect delicate instruments from external electric field?

Electric potential difference is the work , done to bring a unit +ve test charge from one point to another in an electric field:- Can electric potential be necessarilly zero at a point where electric field strength is zero? Explain.

Electric potential difference is the work , done to bring a unit +ve test charge from one point to another in an electric field:- What Is the relation between electric field and electric potential ?

There can be no net charge in a region in which the electric field is uniform at all points". Do you agree with this statement? Justify your answer.

The electric field can be studied in terms of electric field intensity:- What is an electric field?