1. The standard metric units of measurements for electric field strength are:

2. The direction of the electric field vector is defined as:

Use the electric field equations to answer the following questions.

3. A test charge of +1.0x10^-6 C experiences a force of 0.050 N. The electric field strength is

4. A test charge of +1.0x10^-6 C experiences a force of 0.10 N. The electric field strength is

5. An object with a charge of 2.0x10^-4 C creates an electric field. A test charge of +1.0x10^-6 C experiences a force of 0.050 N. The electric field strength is

6. An object with a charge of 2.0x10^-4 C creates an electric field. A test charge of +2.0x10^-6 C experiences a force of 0.10 N. The electric field strength is 7. An object with a charge of 4.0x10^-4 C creates an electric field. A test charge of +1.0x10^-6 C experiences a force of 0.10 N. The electric field strength is

8. An object with a charge of Q creates an electric field. A positive test charge, q, is used to test the strength of the field. Use this scenario to answer the following questions

1. If the charge of the test charge q is doubled, then it will experience______ (2X, 4X, 1/2, 1/4-th, the same) force; the electric field strength at this location will be _______ (2X, 4X, 1/2, 1/4-th, the same as) the original value.
2. If the charge of the object Q is doubled, then the test charge will experience ______ (2X, 4X, 1/2, 1/4-th, the same) force; the electric field strength at this location will be _______ (2X, 4X, 1/2, 1/4-th, the same as) the original value.
3. If the distance between the charge and the test charge is doubled, then the test charge will experience ______ (2X, 4X, 1/2, 1/4-th, the same) force; the electric field strength at this location will be _______ (2X, 4X, 1/2, 1/4-th, the same as) the original value.

9. Use your understanding of electric force and electric field to fill in the following table. Charge creating Charge used to Force Electric Field Distance the E field (C) test the E field experienced by Intensity (N/C) (fictional units) (C) test charge (N) a. 4.0 x10-4 C 1.0 x 106 C 0.20 N d b. 4.0 x10-4 C 2.0 x 106 C 2.0 x105 N/C d C. 8.0 x10-4 C 1.0 x 106 C 0.40 N d d. 8.0 x10-4 C 2.0 x 10-6 C 4.0 x105 N/C e. 8.0 x10-4 C 0.60 N d f. 8.0 x10-4 C 1.0 x 106 C 1.0 x105 N/C 2d g. 8.0 x10-4 C 2.0 x 106 C 2d h. 8.0 x10-4 C 0. 10 N 2d i. 4.0 x10-4 C 8.0 x105 N/C 0.5 d J. 4.0 x10-4 C 0.5 d1. Electric field lines begin on (+, -) charges or at infinity and terminate on (-, +) charges or infinity. The number of lines that emanate from a charge or approach a charge depends upon . At locations where a line meets the surface of a charge, the lines are drawn in a (tangent, radial) direction. The strength of the electric field is (smallest, greatest) wherever the lines are closest together. 2. Use your understanding of electric field lines to identify the charges on the objects in the following configurations. A: + or B: + or C: + or D: + or - E G: or - H: + 1: + or E: + or - F: + or