Physics 102 Magnetism Quiz Questions

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  • 1/13 Questions

    Earth is a magnet and has a magnetic field: true or false

    • True
    • False
Please wait...
About This Quiz

This Physics 102 quiz on magnetism covers fundamental concepts including the definition of a magnet, types of magnets, magnetic poles, magnetic fields, and atomic properties related to magnetism. It's designed to test and reinforce students' understanding of magnetic principles.

Physics 102 Magnetism Quiz Questions - Quiz

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  • 2. 

    Like magnetic poles

    • Repel

    • Attract

    Correct Answer
    A. Repel
    Explanation
    Like magnetic poles repel each other because they have the same type of magnetic field. This is due to the interaction between the magnetic fields produced by the poles. When two like poles are brought close to each other, their magnetic fields interact and push against each other, resulting in a repulsive force. On the other hand, unlike magnetic poles attract each other because they have opposite magnetic fields. The interaction between the magnetic fields of unlike poles causes them to pull towards each other, resulting in an attractive force.

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  • 3. 

    Every magnetic field has poles: true or false

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Every magnetic field has poles. This is because a magnetic field is created by a magnet or a moving electric charge, and magnets always have two poles - a north pole and a south pole. These poles are responsible for the attraction or repulsion between magnets and other magnetic materials. Therefore, it is true that every magnetic field has poles.

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  • 4. 

    A  magnetic domain :

    • Requires a group of atoms with the magnetic fields lined up in the same direction

    • Requires only a weak magnetic field to get domains to line up in the same direciton

    Correct Answer
    A. Requires a group of atoms with the magnetic fields lined up in the same direction
    Explanation
    A magnetic domain refers to a region within a material where the magnetic fields of the atoms are aligned in the same direction. This alignment occurs due to the interaction between the magnetic moments of neighboring atoms. Therefore, a magnetic domain requires a group of atoms with their magnetic fields lined up in the same direction. This alignment of magnetic fields within a domain allows the material to exhibit magnetic properties.

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  • 5. 

    Describe a magnetic field

    • A material that attracts other magnets and causes the force that attracts or repels a magnet

    • Surrounds a magnet pointing from north pole to south pole and causes the force that attracts or repels a magnet

    Correct Answer
    A. Surrounds a magnet pointing from north pole to south pole and causes the force that attracts or repels a magnet
    Explanation
    The correct answer describes a magnetic field as a region that surrounds a magnet and points from its north pole to its south pole. This magnetic field is responsible for the force that attracts or repels other magnets.

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  • 6. 

    What are the two type of magnets

    • Alternating and direct

    • Strong and weak

    Correct Answer
    A. Strong and weak
    Explanation
    The two types of magnets are categorized based on their strength. "Strong" magnets refer to magnets that have a high magnetic field and can attract or repel with greater force. On the other hand, "weak" magnets have a lower magnetic field and exhibit less attraction or repulsion. This categorization helps in understanding the varying magnetic properties and applications of different magnets.

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  • 7. 

    What causes earth magnetic field

    • Requires only a weak magnetic field to get domains to line up in the same direciton

    • A group of atoms with the magnetic fields lined up in the same direction

    • The motion of magma near the earths core

    Correct Answer
    A. The motion of magma near the earths core
    Explanation
    The correct answer is the motion of magma near the earth's core. The earth's magnetic field is generated by the movement of molten iron and nickel in the outer core of the planet. This motion, known as convection, creates electric currents which in turn generate a magnetic field. As the molten material moves, it generates a dynamo effect, creating a magnetic field that extends around the earth. This motion of magma near the earth's core is responsible for the earth's magnetic field.

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  • 8. 

    An atom is:

    • The smallest magnet

    • A magnetic field

    • A magnetic domain

    Correct Answer
    A. The smallest magnet
    Explanation
    An atom can be considered as the smallest magnet because it possesses a property called magnetic moment. This magnetic moment arises due to the motion of charged particles, such as electrons, within the atom. The spinning and orbiting of these charged particles create a tiny magnetic field associated with the atom. Although the magnetic field of an individual atom is extremely weak, it is still considered as the smallest unit of magnetism, making the statement "the smallest magnet" a correct explanation for an atom.

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  • 9. 

    What is used to increase or decrease the voltage in ac system

    • Transformers

    • Voltmeter

    Correct Answer
    A. Transformers
    Explanation
    Transformers are used to increase or decrease the voltage in an AC system. They work on the principle of electromagnetic induction, where a changing current in one coil (primary coil) induces a voltage in another coil (secondary coil). By adjusting the number of turns in each coil, transformers can step up or step down the voltage. This is crucial in transmitting electricity efficiently over long distances, as high voltage is used for transmission to reduce power loss, and then stepped down to a lower voltage for distribution to consumers. Voltmeters, on the other hand, are used to measure the voltage in a circuit and do not have the capability to increase or decrease it.

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  • 10. 

    The earths magnetic field

    • Deflects charged particles from the sun and is used to determine direction by humans and animals

    • Requires only a weak magnetic field to get domains to line up in the same direciton

    • Is a group of atoms with the magnetic fields lined up in the same direction

    Correct Answer
    A. Deflects charged particles from the sun and is used to determine direction by humans and animals
    Explanation
    The earth's magnetic field is responsible for deflecting charged particles from the sun, such as solar wind, away from the Earth's surface. This helps protect the planet from harmful radiation and maintains a stable environment for life. Additionally, the magnetic field is used by humans and animals for navigation purposes, as they can sense and follow the magnetic lines of force to determine direction.

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  • 11. 

    Define magnet

    • A group of atoms with the magnetic fields lined up in the same direction

    • A material that attracts other magnets

    Correct Answer
    A. A material that attracts other magnets
    Explanation
    The correct answer is "a material that attracts other magnets." This definition accurately describes a magnet as a material that has the ability to attract other magnets. Magnets have a magnetic field that can exert a force on other magnetic materials, causing them to be pulled towards the magnet. This definition does not mention anything about atoms or the alignment of their magnetic fields, which may be a characteristic of a magnet but is not a comprehensive definition.

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  • 12. 

    Strong magnetic material :

    • Is a group of atoms with the magnetic fields lined up in the same direction

    • Requires only a weak magnetic field to get domains to line up in the same direciton

    Correct Answer
    A. Requires only a weak magnetic field to get domains to line up in the same direciton
    Explanation
    A strong magnetic material refers to a group of atoms where the magnetic fields are aligned in the same direction. This alignment is achieved by applying a weak magnetic field, which causes the domains (small regions within the material) to line up in the same direction. Therefore, a strong magnetic material requires only a weak magnetic field to get the domains to align.

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  • 13. 

    How often does the earths magnetic field change directions 

    • Every four to five thousand years

    • Every eight to ten years

    • Every four to five million years

    Correct Answer
    A. Every four to five thousand years
    Explanation
    The Earth's magnetic field changes directions every four to five thousand years. This phenomenon is known as geomagnetic reversal or magnetic flip. It occurs when the magnetic north and south poles switch places. Scientists have studied the Earth's magnetic field through geological records and have found evidence of these reversals happening throughout the planet's history. These changes in the magnetic field have implications for navigation systems, animal migration, and even climate change.

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  • Current Version
  • Feb 27, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Nov 20, 2015
    Quiz Created by
    L2newasa

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