A test charge of - 1.4 * 10-7 coulombs experiences a force of 5.4 * 10-1 newtons. Calculate the magnitude of the electric field created by the negative test charge.

Magnitude of the electric field created by the negative charge is 0.38*10^ (-7) N/C.

The electric field is given by the formula

F=qE

here, F is the force, q is the charge, E is the electric field

Plugging the values in the above expression

5.4*10^ (-1) = -1.4*10^ (-7) * E

E=0.38*10^ (-7) N/C