1. Positive charged particles headed toward the earth from space, would tend (at mid-latitudes) to reach the surface coming down from the 1. North 2. South 3. East 4. West 5. split East and West

2. A conducting rod is drawn down through the B-field as shown. Free electrons from the rod will 1)flow through the hand to ground. 2)tend to bunch up at the far end. 3)be pushed to upper surface of the rod. 4) be unaffected.

3.  Units of  : T·m 2  “weber” MAGNETIC FLUX   BAcos 

4. If a coil is shrinking in a B field pointing into the page, in what direction is the induced current? 1)clockwise 2)counter-clockwise 3)no induced current

5. If the B field pointing out of the page suddenly drops to zero, in what direction is the induced current? 1) clockwise 2) counter-clockwise 3) no induced current

6. If a S pole moves towards the loop from behind the page, in what direction is the induced current? 1) clockwise 2) counter-clockwise 3) no induced current S

7. A wire loop is being pulled through a uniform magnetic field. What is the direction of the induced current? x x x x x x 1)clockwise 2)counter-clockwise 3)no induced current

8. A wire loop is being pulled away from a current-carrying wire in the direction of the green arrow. What is the direction of the induced current in the loop? 1) clockwise 2) counter-clockwise 3) no induced current I What is the induced current if the wire loop moves in the direction of the red arrow?

9. No change in flux since no change in B field. B field going into the page gets smaller. Induced current will try to increase the B field. 1) clockwise 3) no induced current No change in flux: B field not changing; area not changing; angle not changing 3)no induced current The S pole field points into the page. S pole is moving towards the loop means the B field is increasing into the page. The induced current will oppose the increase, which means it will have a B field pointing out of the page. Right Hand Rules gives a CCW current. 2) counter-clockwise Magnetic flux is getting smaller. Induced current will oppose the change  try to make the flux bigger Right hand rule: CCW current gives B field out of the page 2) counter-clockwise Magnetic flux is getting smaller since area is getting smaller. Induced current will oppose the change  try to make the flux bigger Right hand rule: CW current gives B field into of the page A) clockwise 2)tend to bunch up at the far end. 4. West