A test charge is placed at a distance of 2.0 × 10-1 meters from a charge of 5.4 × 10-8 coulombs. what is the electric field at the test charge? (k = 9.0 × 109 newton·meter2/coulomb2) a. 1.0 × 10-2 newtons/coulomb b. 1.2 × 104 newtons/coulomb c. 2.5 × 104 newtons/coulomb d. 3.5 × 10-1 newtons/coulomb e. 5.4 × 10-8 newtons/coulomb