Electromagnetism theory questions

[skg94]

Homework Statement

1. http://http://tinypic.com/r/2r386q1/6

Determine the polarity of the induced magnetic field and direction of electron flow for each. Indicate which end of the generator becomes a negative terminal.

I don't know how to do the last two that you see e and f 2. In the following diagram, a metaliic conductor is moved along a set of conducting rails across a magnetic field. Which end of the conductor becomes the negative terminal? In which direction does convetional current flow in the circut?

http://tinypic.com/r/hwijxj/63. A positively charged sphere is suspended between two large metal plates as shown in the diagram. A wire is placed between the poles of a horseshow magnet and connected to the metal plates. When the wire is drawn horizontally to the right the charged ball is observed to swing toward the right hand metal plate.

a) Determine the direction of the induced electron flow in the wire in the horseshoe magnet.
b) Is the top pole of hte magnet a north or south pole explain?
http://tinypic.com/r/ncmkh2/6

Homework Equations

none

The Attempt at a Solution

Im completely at a loss at these theoritcally quesitons if anyone can please help me, i have a test tomorrow and i am desperate to learn, i have made some attempts but my logic on these things seem flawed and are just mere guesses.- won't work so the link is posted

 

[Spinnor]

The first link seems dead.

 

[Spinnor]

First link, dead. Second link, missing text and image. Third link, missing text.

I think answers to all of your questions could be found in a careful study of the following link,

http://hyperphysics.phy-astr.gsu.edu/hbase/electric/farlaw.html

Maybe watch,



Found from,

http://www.youtube.com/results?sear...0.0.0.0.92.92.1.1.0...0.0...1ac.1.0pWBbibfHkY

Good luck!