1. Exam 1Quiz 1Quiz 2 75  12 Avg score : 8  26  2 Single most common score : 75 105 For most of you, your current quiz average and exam average are exactly the same For those of you for whom that is not true, remember the 4 quiz grades together are equal in weight to 1 unit exam. Each quiz is just ¼ of 1/7 th of your final grade. You can determine where you stand by a simple average (all equal in weight) of your reci grade, lab grade, 1 st exam, and quiz average.

2. A copper coil is set just behind the wire loop of this circuit. As the switch is closed, 1)a clockwise current is induced in the copper loop. 2)a counter clockwise current is induced in the copper loop. 3)no current appears in the copper loop.

3. A copper coil rests flat on a tabletop next to the wire loop of this simple circuit. As the switch is opened, 1)a clockwise current is induced in the copper loop. 2)a counter clockwise current is induced in the copper loop. 3)no current appears in the copper loop.

4. A copper coil is set just behind the wire loop of this circuit. As the switch is opened, 1)a clockwise current is induced in the copper loop. 2)a counter clockwise current is induced in the copper loop. 3)no current appears in the copper loop.

5. 2) a counter clockwise current is induced in the copper loop. A clockwise current is created in the black wire loop, establishing a sudden magnetic field pointing down into the center of the copper coil. To counter this, the coil will try to create a field of its own pointing out. It does this with a counter clockwise current. 2) a counter clockwise current is induced in the copper loop. While current flows the wire loop’s field points into the screen within its center, but doubles back outside the loop. That means where the copper coil lies, the field initially points out. When the switch is opened, this field suddenly vanishes. To counter the disappearance of flux, the coil tried to create its own, which requires a clockwise induced current. 1) a clockwise current is induced in the copper loop. The coil tried to replace the flux that starts to disappear as soon as the switch is opened.