The tension T is a belt passing round a pulley wheel and in contact with the pulley over an angle tita radian is given by T=Toeutita

3984875 N/C

Explanation:

Applying,

E = kq/r² Equation 1

Where E = Electric field, q = charge, r = distance, k = coulomb's constant.

From the question,

Given: q = 7.10 mC = 0.0071 C, r = 4.0 m

Constant: k = 8.98×10⁹ Nm²/C²

Substitute these values into equation 1

E = 0.0071(8.98×10⁹)/4²

E = 3984875 N/C

Hence the electric field is 3984875 N/C