1. PHYS-1700/2100PHYS-1700/2100 III5 Ampere’s LawNEBRASKA WESLEYAN UNIVERSITYSPRING 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM BOB FAIRCHILD of 9 1 [Insert puzzler here]

2. PHYS-1700/2100PHYS-1700/2100 III5 Ampere’s LawNEBRASKA WESLEYAN UNIVERSITYSPRING 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM BOB FAIRCHILD of 9 2

3. PHYS-1700/2100PHYS-1700/2100 III5 Ampere’s LawNEBRASKA WESLEYAN UNIVERSITYSPRING 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM BOB FAIRCHILD of 9 3 1 of 3 Closed loops A and B are drawn in the vicinity of a long straight current carrying wire. Loop A lies in a plane perpendicular to the wire, while B lies in a plane that is nearly parallel with the wire. The path integral of the magnetic field for B is 1.Greater than that for A. 2.Equal to that for A. 3.Less than that for A. A B I

4. PHYS-1700/2100PHYS-1700/2100 III5 Ampere’s LawNEBRASKA WESLEYAN UNIVERSITYSPRING 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM BOB FAIRCHILD of 9 4 2 of 3 Imagine two line currents flowing perpendicular to the display, equal in magnitude but opposite in direction. Consider the two loops shown, a and b. Which is true about the path integral of B around the two loops? 1.It is zero for both. 2.It is the same for both, but not zero. 3.It is zero for a but not for b. 4.It is zero for b but not for a. II a b

5. PHYS-1700/2100PHYS-1700/2100 III5 Ampere’s LawNEBRASKA WESLEYAN UNIVERSITYSPRING 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM BOB FAIRCHILD of 9 5 3 of 3 A solenoid is driven by 60 Hz AC. This means that the magnetic field changes direction inside the solenoid 60 times a second. An iron (ferromagnetic) rod 1.Will feel an attraction to the solenoid. 2.Will feel a repulsion by the solenoid. 3.Will have no average force applied to it.

6. PHYS-1700/2100PHYS-1700/2100 III5 Ampere’s LawNEBRASKA WESLEYAN UNIVERSITYSPRING 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM BOB FAIRCHILD of 9 6

7. PHYS-1700/2100PHYS-1700/2100 III5 Ampere’s LawNEBRASKA WESLEYAN UNIVERSITYSPRING 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM BOB FAIRCHILD of 9 7 1 of 3 Closed loops A and B are drawn in the vicinity of a long straight current carrying wire. Loop A lies in a plane perpendicular to the wire, while B lies in a plane that is nearly parallel with the wire. The path integral of the magnetic field for B is 1.Greater than that for A. 2.Equal to that for A. 3.Less than that for A. A B I

8. PHYS-1700/2100PHYS-1700/2100 III5 Ampere’s LawNEBRASKA WESLEYAN UNIVERSITYSPRING 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM BOB FAIRCHILD of 9 8 2 of 3 Imagine two line currents flowing perpendicular to the display, equal in magnitude but opposite in direction. Consider the two loops shown, a and b. Which is true about the path integral of B around the two loops? 1.It is zero for both. 2.It is the same for both, but not zero. 3.It is zero for a but not for b. 4.It is zero for b but not for a. II a b

9. PHYS-1700/2100PHYS-1700/2100 III5 Ampere’s LawNEBRASKA WESLEYAN UNIVERSITYSPRING 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM BOB FAIRCHILD of 9 9 3 of 3 A solenoid is driven by 60 Hz AC. This means that the magnetic field changes direction inside the solenoid 60 times a second. An iron (ferromagnetic) rod 1.Will feel an attraction to the solenoid. 2.Will feel a repulsion by the solenoid. 3.Will have no average force applied to it.

10. PHYS-1700/2100PHYS-1700/2100 III5 Ampere’s LawNEBRASKA WESLEYAN UNIVERSITYSPRING 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM BOB FAIRCHILD of 9 10 14141414 25252525 36363636 PROJECTION SCREEN HAND IN TODAY’S ACTIVITIES SHEETS

11. PHYS-1700/2100PHYS-1700/2100 III5 Ampere’s LawNEBRASKA WESLEYAN UNIVERSITYSPRING 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM BOB FAIRCHILD of 9 11 2 of 3 Imagine several long, straight wires perpendicular to the screen (page). Each wire is carrying the current shown. The path integral of B around the closed loop b is 1.Greater than that for closed loop a. 2.Equal to that for closed loop a. 3.Less than that for closed loop a. I a b I 2I2I3I3I NOT USED