This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: Physics 222 Fall 2011 Name:_______________ Section:______________ Quiz 6A A long, thin wire is wrapped a number of times around a non-conducting cylinder forming a coil (a solenoid.) It is being unraveled such that it loses windings at a constant rate. A magnetic field is directed along the axis of the cylinder such that when you look from one side, it points away from you. Let the positive direction be toward you (i.e. let the surface perpendicular to the axis have an area vector pointed toward you.) a) What is the sign (+ or −) of the magnetic flux (total flux through all loops of the coil)? Describe/show your reasoning. b) What is the sign (+ or −) of the rate at which the magnetic flux through the coil changes? Describe/show your reasoning (Hint: as the coil unravels, the area of the coil changes.) c) What is the direction (clockwise or counterclockwise) of the induced current in the wire? Describe/show your reasoning. Physics 222 Fall 2011 Name:_______________ Section:______________...
View Full Document
- Fall '09
- Magnetic Field