Chapter 21: Electric Fields Practice Test
 1. What work is done when 3.5 C is moved through an electric potential difference of 4.5 V?
 a. 1.6 × 101 J/C b. negative 1.6 × 101 J c. 7.8 × 10-1 J d. 1.6 × 101 J
 2. The __________ is a vector quantity that relates the force on a test charge to the size of the charge.
 a. electric field b. potential c. capacitor d. equipotential
 3. What electric potential difference is applied to two metal plates 0.350 m apart if the electric field between them is 3.75 × 103 N/C?
 a. 1.31 V b. 1.07 × 103 V c. 1.31 × 103 V d. 1.07 × 104 V
 4. The electric field at the location of q' is represented by which of the following equations?
 a. E= q/ΔV b. E= W/q' c. E= q'/Fq' d. E= F/q'
 5. The direction of the electric field is the direction of the__________.
 a. potential difference b. force on the positive test charge c. work done moving the test charge d. force on the negative test charge
 6. A 6.4-ΜF capacitor is first charged so that the electric potential difference is 5.0 V. How much additional charge is needed to increase the electric potential difference to 12.0 V?
 a. 7.7 × 105 C b. 4.5 × 105 C c. 4.5 × 10-5 C d. 7.7 × 10-5 C
 7. Touching a body to Earth to eliminate excess charge is called __________.
 a. static b. grounding c. capacitance d. resistance
 8. The ratio of charge stored to electric potential difference is called the __________.
 a. resistance b. capacitor c. current d. capacitance
 9. Electric potential difference is measured in __________.
 a. coulombs per joule b. volts per coulomb c. joules per coulomb d. newtons per coulomb
 10. The SI derived unit of potential difference is the __________.
 a. joule b. ohm c. volt d. coulomb