1. A drop of oil (m = 8.000 × 10 7 g) with excess negative charge is suspended between two horizontal charged plates by an electric field of magnitude 1.960 × 108 N/C. The plate spacing is 25.00 cm. (a) What is the direction of the electric force acting on the drop of oil? (Circle one.) Unable to be determined Up Down Left Right (b) What is the direction of the electric field acting on the drop of oil? (Circle one.) Left Right Unable to be determined Up Down (c) Choose the sign of the charge on each plate. (Circle one of each.) Upper plate: Positive Negative Unable to be determined Unable to be determined Lower plate: Positive Negative (d) Find the amount of charge on the drop of oil. (e) Determine the number of electrons stuck to the drop of oil. (f) Determine the voltage across the plates. Which plate is at a higher potential?

1. A drop of oil (m = 8.000 × 10 7 g) with excess negative charge is suspended between two horizontal charged plates by an electric field of magnitude 1.960 × 108 N/C. The plate spacing is 25.00 cm. (a) What is the direction of the electric force acting on the drop of oil? (Circle one.) Unable to be determined Up Down Left Right (b) What is the direction of the electric field acting on the drop of oil? (Circle one.) Left Right Unable to be determined Up Down (c) Choose the sign of the charge on each plate. (Circle one of each.) Upper plate: Positive Negative Unable to be determined Unable to be determined Lower plate: Positive Negative (d) Find the amount of charge on the drop of oil. (e) Determine the number of electrons stuck to the drop of oil. (f) Determine the voltage across the plates. Which plate is at a higher potential?