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    how are the magnetic field lines near the south pole of a magnet affected when a second south pole is brought near it? the field lines combine with the lines around the second south pole. the field lines overlap with the lines from the second south pole. the field lines bend toward the second south pole. the field lines bend away from the second south pole.

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    Magnets and Magnetism

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    QUIZ

    Magnets and Magnetism

    Magnets and Magnetism 0%

    1 8th 8th Physics Burton Melancon 1 year

    10 Qs

    1. Multiple-choice 30 seconds Q.

    Which element is magnetic?

    answer choices calcium chromium carbon cobalt 2. Multiple-choice 45 seconds Q.

    Jill uses a magnet to pick up a nail. Then, she touches the nail to a paper clip and picks up the paper clip. What will most likely happen when she pulls the magnet away from the nail?

    answer choices

    The paper clip will stay attached to the nail because the nail is now a permanent magnet.

    The paper clip will stay attached to the nail because the paper clip is now a permanent magnet.

    The paper clip will fall off of the nail because the nail was only a temporary magnet.

    The paper clip will fall off of the nail because the nail is now magnetized in the opposite direction.

    3. Multiple-choice 30 seconds Q.

    Mr. Garcia uses magnets to hold a poster on a steel filing cabinet because a main component of steel is

    answer choices iron. carbon. plastic. glass. 4. Multiple-choice 45 seconds Q.

    Which refers to the ends of a magnet where the forces are strongest?

    answer choices attracting forces opposing forces magnetic fields magnetic poles 5. Multiple-choice 30 seconds Q.

    In an illustration, lines of force are drawn around a magnet to illustrate the magnetic

    field. induction. poles. force. answer choices field. induction. poles. force. 6. Multiple-choice 45 seconds Q.

    Which statement about Earth’s core helps explain Earth’s magnetic field?

    answer choices

    Earth’s core is composed of magnets.

    Earth’s core is composed of iron and nickel.

    The outer core is solid.

    The inner core is liquid and moving.

    7. Multiple-choice 30 seconds Q.

    Which best describes Earth’s magnetic field lines?

    answer choices

    The field lines go out of Earth near the South Pole, enter Earth in the North Pole, and are aligned with the geographic poles

    The field lines go out of Earth near the South Pole, enter Earth in the North Pole, and are not aligned with the geographic poles.

    The field lines go out of Earth near the North Pole, enter Earth in the South Pole, and are aligned with the geographic poles.

    The field lines go out of Earth near the North Pole, enter Earth in the South Pole, and are not aligned with the geographic poles.

    8. Multiple-choice 45 seconds Q.

    A compass taken to Earth’s moon does not point in a specific direction on the moon.

    What is the most likely reason for the difference between how the compass works on Earth and on the moon?

    answer choices

    The moon lacks an atmosphere.

    The moon contains no rocks that have iron.

    The moon does not have a strong magnetic field.

    The moon has no bodies of water.

    9. Multiple-choice 30 seconds Q.

    An object that is made of which material is likely to be attracted to a magnet?

    answer choices nitrogen nickel paper plastic 10. Multiple-choice 45 seconds Q.

    How are the magnetic field lines near the south pole of a magnet affected when a second south pole is brought near it?

    answer choices

    The field lines combine with the lines around the second south pole.

    The field lines overlap with the lines from the second south pole.

    The field lines bend toward the second south pole.

    The field lines bend away from the second south pole.

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    How are the magnetic field lines near the south pole of a magnet affected when a second south pole is brought near it?

    Click card to see definition 👆

    The field lines bend away from the second south pole.

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    A bar magnet and a second object are hung from metal rods. The diagram below shows what happens when both objects are released.

    Which best describes the object on the right?

    Click card to see definition 👆

    a bar magnet with its south pole on the left

    Click again to see term 👆

    1/10 Created by Trea_Castro

    Terms in this set (10)

    How are the magnetic field lines near the south pole of a magnet affected when a second south pole is brought near it?

    The field lines bend away from the second south pole.

    A bar magnet and a second object are hung from metal rods. The diagram below shows what happens when both objects are released.

    Which best describes the object on the right?

    a bar magnet with its south pole on the left

    Laticia draws the diagram below to show Earth's magnetic field.

    What error did Laticia make?

    The arrows to the right of Earth should point up.

    Mr. Garcia uses magnets to hold a poster on a steel filing cabinet because a main component of steel is

    Iron

    Which best describes Earth's magnetic field lines?

    The field lines go out of Earth near Antarctica, enter Earth in northern Canada, and are not aligned with the geographic poles.

    An object that is made of which material is likely to be attracted to a magnet?

    nickel

    Which statements correctly describe Earth's magnetic field? Check all that apply.

    Field lines enter Earth near the North Pole.

    The magnetic pole near Antarctica is a north pole.

    In an illustration, lines of force are drawn around a magnet to illustrate the magnetic

    field

    Jill uses a magnet to pick up a nail. Then, she touches the nail to a paper clip and picks up the paper clip. What will most likely happen when she pulls the magnet away from the nail?

    The paper clip will fall off of the nail because the nail was only a temporary magnet.

    Which statement describes a property of magnets?

    Magnets attract or repel other magnets.

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    20.1 Magnetic Fields, Field Lines, and Force

    Physics

    20.1 Magnetic Fields, Field Lines, and Force

    20.1 Magnetic Fields, Field Lines, and Force

    SECTION LEARNING OBJECTIVES

    By the end of this section, you will be able to do the following:

    Summarize properties of magnets and describe how some nonmagnetic materials can become magnetized

    Describe and interpret drawings of magnetic fields around permanent magnets and current-carrying wires

    Calculate the magnitude and direction of magnetic force in a magnetic field and the force on a current-carrying wire in a magnetic field

    Section Key Terms

    Curie temperature domain electromagnet electromagnetism ferromagnetic

    magnetic dipole magnetic field magnetic pole magnetized north pole

    permanent magnet right-hand rule solenoid south pole

    Magnets and Magnetization

    People have been aware of magnets and magnetism for thousands of years. The earliest records date back to ancient times, particularly in the region of Asia Minor called Magnesia—the name of this region is the source of words like magnet. Magnetic rocks found in Magnesia, which is now part of western Turkey, stimulated interest during ancient times. When humans first discovered magnetic rocks, they likely found that certain parts of these rocks attracted bits of iron or other magnetic rocks more strongly than other parts. These areas are called the poles of a magnet. A magnetic pole is the part of a magnet that exerts the strongest force on other magnets or magnetic material, such as iron. For example, the poles of the bar magnet shown in Figure 20.2 are where the paper clips are concentrated.

    Figure 20.2 A bar magnet with paper clips attracted to the two poles.

    If a bar magnet is suspended so that it rotates freely, one pole of the magnet will always turn toward the north, with the opposite pole facing south. This discovery led to the compass, which is simply a small, elongated magnet mounted so that it can rotate freely. An example of a compass is shown Figure 20.3. The pole of the magnet that orients northward is called the north pole, and the opposite pole of the magnet is called the south pole.

    Figure 20.3 A compass is an elongated magnet mounted in a device that allows the magnet to rotate freely.

    The discovery that one particular pole of a magnet orients northward, whereas the other pole orients southward allowed people to identify the north and south poles of any magnet. It was then noticed that the north poles of two different magnets repel each other, and likewise for the south poles. Conversely, the north pole of one magnet attracts the south pole of other magnets. This situation is analogous to that of electric charge, where like charges repel and unlike charges attract. In magnets, we simply replace charge with pole: Like poles repel and unlike poles attract. This is summarized in Figure 20.4, which shows how the force between magnets depends on their relative orientation.

    Figure 20.4 Depending on their relative orientation, magnet poles will either attract each other or repel each other.

    Consider again the fact that the pole of a magnet that orients northward is called the north pole of the magnet. If unlike poles attract, then the magnetic pole of Earth that is close to the geographic North Pole must be a magnetic south pole! Likewise, the magnetic pole of Earth that is close to the geographic South Pole must be a magnetic north pole. This situation is depicted in Figure 20.5, in which Earth is represented as containing a giant internal bar magnet with its magnetic south pole at the geographic North Pole and vice versa. If we were to somehow suspend a giant bar magnet in space near Earth, then the north pole of the space magnet would be attracted to the south pole of Earth’s internal magnet. This is in essence what happens with a compass needle: Its magnetic north pole is attracted to the magnet south pole of Earth’s internal magnet.

    Figure 20.5 Earth can be thought of as containing a giant magnet running through its core. The magnetic south pole of Earth’s magnet is at the geographic North Pole, so the north pole of magnets is attracted to the North Pole, which is how the north pole of magnets got their name. Likewise, the south pole of magnets is attracted to the geographic South Pole of Earth.

    What happens if you cut a bar magnet in half? Do you obtain one magnet with two south poles and one magnet with two north poles? The answer is no: Each half of the bar magnet has a north pole and a south pole. You can even continue cutting each piece of the bar magnet in half, and you will always obtain a new, smaller magnet with two opposite poles. As shown in Figure 20.6, you can continue this process down to the atomic scale, and you will find that even the smallest particles that behave as magnets have two opposite poles. In fact, no experiment has ever found any object with a single magnetic pole, from the smallest subatomic particle such as electrons to the largest objects in the universe such as stars. Because magnets always have two poles, they are referred to as magnetic dipoles—di means two. Below, we will see that magnetic dipoles have properties that are analogous to electric dipoles.

    Source : openstax.org

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