1. A circular loop of wire is in a region of spatially uniform magnetic field. The magnetic field is directed into the plane of the figure. If the magnetic field magnitude is constant, Q29.1 1. the induced emf is clockwise 2. the induced emf is counterclockwise 3. the induced emf is zero 4. answer depends on how strong the field is

2. A circular loop of wire is in a region of spatially uniform magnetic field. The magnetic field is directed into the plane of the figure. If the magnetic field magnitude is constant, A29.1 1. the induced emf is clockwise 2. the induced emf is counterclockwise 3. the induced emf is zero 4. answer depends on how strong the field is

3. A circular loop of wire is in a region of spatially uniform magnetic field. The magnetic field is directed into the plane of the figure. If the magnetic field magnitude is decreasing, Q29.2 1. the induced emf is clockwise 2. the induced emf is counterclockwise 3. the induced emf is zero 4. answer depends on the rate of change of the field

4. A circular loop of wire is in a region of spatially uniform magnetic field. The magnetic field is directed into the plane of the figure. If the magnetic field magnitude is decreasing, A29.2 1. the induced emf is clockwise 2. the induced emf is counterclockwise 3. the induced emf is zero 4. answer depends on the rate of change of the field

5. Q29.3 1. current flows downward through R and is proportional to B 2. current flows upward through R and is proportional to B 3. current flows downward through R and is proportional to B 2 4. current flows upward through R and is proportional to B 2 5. none of the above What statement about the induced current in the resistor R is correct? A flexible loop of wire lies in a uniform magnetic field of magnitude B directed into the plane of the picture. The loop is pulled as shown by the arrows, forming a loop of zero area and inducing a current.

6. A29.3 1. current flows downward through R and is proportional to B 2. current flows upward through R and is proportional to B 3. current flows downward through R and is proportional to B 2 4. current flows upward through R and is proportional to B 2 5. none of the above What statement about the induced current in the resistor R is correct? A flexible loop of wire lies in a uniform magnetic field of magnitude B directed into the plane of the picture. The loop is pulled as shown by the arrows, forming a loop of zero area and inducing a current.

7. The rectangular loop of wire is being moved to the right at constant velocity. A constant current I flows in the long wire in the direction shown. Which of the following statements about the current induced in the loop is correct? Q29.4 1. the induced current is clockwise and proportional to I 2. the induced current is counterclockwise and proportional to I 3. the induced current is clockwise and proportional to I 2 4. the induced current is counterclockwise and proportional to I 2 5. there is no induced current

8. The rectangular loop of wire is being moved to the right at constant velocity. A constant current I flows in the long wire in the direction shown. Which of the following statements about the current induced in the loop is correct? A29.4 1. the induced current is clockwise and proportional to I 2. the induced current is counterclockwise and proportional to I 3. the induced current is clockwise and proportional to I 2 4. the induced current is counterclockwise and proportional to I 2 5. there is no induced current

9. The rectangular loop of wire is being moved to the right at constant velocity. A constant current I flows in the long wire in the direction shown. Which of the following statements about the current induced in the loop is correct? Q29.5 1. the induced current is clockwise and proportional to I 2. the induced current is counterclockwise and proportional to I 3. the induced current is clockwise and proportional to I 2 4. the induced current is counterclockwise and proportional to I 2 5. there is no induced current

10. The rectangular loop of wire is being moved to the right at constant velocity. A constant current I flows in the long wire in the direction shown. Which of the following statements about the current induced in the loop is correct? A29.5 1. the induced current is clockwise and proportional to I 2. the induced current is counterclockwise and proportional to I 3. the induced current is clockwise and proportional to I 2 4. the induced current is counterclockwise and proportional to I 2 5. there is no induced current

11. The rectangular loop of wire is being moved to the right at constant velocity. A constant current I flows in the long wire in the direction shown. Which are the directions of the magnetic forces on the left-hand (L) and right-hand (R) sides of the loop? Q29.6 1. L side: force to the left; R side: force to the left 2. L side: force to the left; R side: force to the right 3. L side: force to the right; R side: force to the left 4. L side: force to the right; R side: force to the right 5. none of the above

12. The rectangular loop of wire is being moved to the right at constant velocity. A constant current I flows in the long wire in the direction shown. Which are the directions of the magnetic forces on the left-hand (L) and right-hand (R) sides of the loop? A29.6 1. L side: force to the left; R side: force to the left 2. L side: force to the left; R side: force to the right 3. L side: force to the right; R side: force to the left 4. L side: force to the right; R side: force to the right 5. none of the above

13. The drawing shows the uniform magnetic field inside a long, straight solenoid. The field is directed into the plane of the drawing, and is increasing. What is the direction of the electric force on a positive point charge placed at point a, point b, or point c (the center of the solenoid)? Q29.7 1. a: to the left; b: straight up; c: down and to the left 2. a: to the right; b: straight down; c: up and to the right 3. a: to the left; b: straight up; c: no force 4. a: to the right; b: straight down; c: no force 5. none of the above

14. The drawing shows the uniform magnetic field inside a long, straight solenoid. The field is directed into the plane of the drawing, and is increasing. What is the direction of the electric force on a positive point charge placed at point a, point b, or point c (the center of the solenoid)? A29.7 1. a: to the left; b: straight up; c: down and to the left 2. a: to the right; b: straight down; c: up and to the right 3. a: to the left; b: straight up; c: no force 4. a: to the right; b: straight down; c: no force 5. none of the above