# PY212 Midterm 1

## 9 questions

• 1. Open Ended
30 seconds
1 pt
Which are true: 1) Two negative charges repel each other. 2) A neutral object contains no charge carriers. 3) Electric charge is quantized. 4) Electric charge is conserved. 5) Two positive charges attract each other. 6) A positive charge and a negative charge attract each other.
• 2. Open Ended
30 seconds
1 pt
Which are true? 1) In a uniform electric field, the field lines are straight, parallel, and uniformly spaced. 2) Electric field lines near positive point charges radiate outward. 3) The electric force acting on a point charge is proportional to the magnitude of the point charge. 4) Electric field lines near negative point charges circle clockwise. 5) The electric field created by a point charge is constant throughout space.
• 3. Open Ended
30 seconds
1 pt
Which of the following statements are true for electric field lines? 1) Electric field lines can never intersect. 2) Electric field lines are continuous; they do not have a beginning or an ending. 3) Electric field lines point away from positive charges and toward negative charges. 4) Electric field lines are close together in regions of space where the magnitude the electric field is weak and are father apart where it is strong. 5) At every point in space, the electric field vector at that point is tangent to the electric field line through that point.