The figure below shows a test charge that is placed d cm from an electron. Determine the electric field strength at the location of the test charge. (The charge of an electron is -1.6*10- C.) d = 5.3 d cm Test charge O a. -5.1e-7 O b. It is impossible to determine without knowing the quantity of charge on the test charge. O c. -2.7e-8 O d. -5.1e-11