Question

1) A magnet is dropped vertically through a horizontal loop of wire, with the south pole of the magnet pointing downward. Describe the induced current in the loop, as viewed from above the loop.

A)Counterclockwise as the magnet approaches, then clockwise after it passes through

B)Clockwise as the magnet approaches, then counterclockwise after it passes through

C)Counterclockwise always

D)Clockwise always

2) When current flows into a resistor in a circuit, what is actually happening to the individual electrons?

A)They slow down but do not fully stop - they exit the resistor going slower than when they entered.

B)They proceed through the resistor without slowing down.

C)A certain percent of them are absorbed by the resistor as they travel through. That percent depends on the resistance value.

D)They immediately stop moving as soon as they enter.

E)They slow down and gradually come to a stop

3) Two magnets, a powerful but small neodymium bar magnet and a weak but large iron horseshoe magnet, are placed a few centimeters from each other. Because the neodymium magnet is so small in size and in mass, it is the one that moves toward the stationary iron magnet.

What does this mean about the forces these two magnets exert on each other?

A)The force of the iron magnet pulling on the neodymium magnet is stronger

B)The force of the neodymium magnet pulling on the iron magnet is stronger

C)The two forces are equal in strength

D)Not enough information to decide\

4) A neutral, ungrounded ideal conductor with an irregular shape is placed in an external electric field. Which of the following is not true?

A)There is no net charge within the interior of the conductor

B)The electric field within the conductor is zero

C)The voltage throughout the entire conductor is the same everywhere

D)The external electric field exerts no force on the conductor

Answer 1

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