Chapter 17 Test: Magnetism
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A bar magnet has two poles -- a north pole and a south pole. If the bar was cut in half....
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Each half would have its own north pole and south pole.
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Who cares
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The magnet will no longer be magnetized
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Each half would either be north or south
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None of the above
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This test will determine the knowledge gained and absorbed from the lesson on chapter 17 magnetism.
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- 2.
What was the first naturally occurring magnetic rock?
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Magnesian
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Lodestone
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Magetisian
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Magnesiantite
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None of the above
Correct Answer
A. LodestoneExplanation
Lodestone is considered the first naturally occurring magnetic rock because it has been used for centuries for its magnetic properties. It is a type of magnetite, a mineral that is naturally magnetic. Lodestone is able to attract iron and other magnetic materials, and it played a significant role in the development of compasses and navigation. Its magnetic properties were observed and utilized by ancient civilizations, making it the first known naturally occurring magnetic rock.Rate this question:
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- 3.
What is a transformer?
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A device that increases or decreases the voltage of alternating current
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A mega huge robot from who knows where and stars in a movie with Shia Labeouf and Megan Fox
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A decive that changes direction of alternating currents
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A machine that makes currents
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None of the above
Correct Answer
A. A device that increases or decreases the voltage of alternating currentExplanation
A transformer is a device that increases or decreases the voltage of alternating current. It does this by utilizing two coils of wire, known as the primary and secondary windings, which are wrapped around a core. The alternating current flowing through the primary winding creates a varying magnetic field in the core, which in turn induces a voltage in the secondary winding. This allows for the efficient transmission of electrical energy at different voltage levels, such as stepping up voltage for long-distance power transmission or stepping down voltage for use in household appliances.Rate this question:
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- 4.
What is the definition of a magnetic pole?
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One of tow points, such as the ends of a magnet, that have opposing magnetic qualities
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One of three points, in which each side of a magnet has magnetism
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One of two points, such as the ends of a magnet, that have opposing magnetic qualities
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A pole that's magnetic
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None of the above
Correct Answer
A. One of two points, such as the ends of a magnet, that have opposing magnetic qualitiesExplanation
A magnetic pole refers to one of the two points on a magnet, typically located at the ends, that possess opposing magnetic qualities. These poles are characterized by their ability to attract or repel other magnetic objects. The concept of magnetic poles is fundamental in understanding the behavior and properties of magnets.Rate this question:
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- 5.
What is a generator?
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A machine that converts electrical energy into mechanical energy
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An electrical current produced by a mechanical energy
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A machine that converts mechanical energy into electrical energy
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A mechanical device that produces energy through sound
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None of the above
Correct Answer
A. A machine that converts mechanical energy into electrical energyExplanation
A generator is a machine that converts mechanical energy into electrical energy. It does this by using a source of mechanical power, such as a turbine or engine, to spin a magnet within a coil of wire. This motion creates a flow of electrons, generating an electrical current. Generators are commonly used in power plants, as well as in portable devices like backup generators and electric generators for camping. They play a crucial role in providing electricity in various applications.Rate this question:
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- 6.
Which of these would increase the force of an electromagnet?
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Increasing the current being passed through the coil
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Decreasing the number of windings in the coil
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Reversing the flow of electricity through the coil
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Increasing the current being passed around the coil
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None of the above
Correct Answer
A. Increasing the current being passed through the coilExplanation
Increasing the current being passed through the coil would increase the force of an electromagnet. This is because the strength of an electromagnet is directly proportional to the current flowing through the coil. By increasing the current, more magnetic field lines are produced, resulting in a stronger electromagnet.Rate this question:
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- 7.
When a magnet is subjected to heat, its magnetism will...
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Stay the same
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Increase
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Disappear
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Decrease
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None of the above
Correct Answer
A. DecreaseExplanation
When a magnet is subjected to heat, its magnetism will decrease. This is because heat causes the atoms in the magnet to vibrate more, disrupting the alignment of the magnetic domains within the material. As a result, the magnetism weakens and the magnet becomes less magnetic.Rate this question:
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- 8.
Bonus Question: List as many uses of magnets you can think of?
Correct Answer
RadioExplanation
A radio uses magnets in its speaker to convert electrical signals into sound waves. Magnets are used in the speaker to create a magnetic field that interacts with the electrical current passing through the coil, causing it to vibrate and produce sound. This vibration creates the sound waves that we hear from the radio.Rate this question:
- 9.
The lights of the Aurora Borealis result from...
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The coming of aliens
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Particles from the Sun hitting the Earth's magneticsphere
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Particles from the Sun hitting Earth's magnetosphere
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Particles from the Moon hitting the Earth's magnetosphere
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None of the above
Correct Answer
A. Particles from the Sun hitting Earth's magnetosphereExplanation
The lights of the Aurora Borealis, also known as the Northern Lights, are caused by particles from the Sun hitting Earth's magnetosphere. When charged particles from the Sun, such as electrons and protons, are carried by the solar wind towards Earth, they interact with the Earth's magnetic field. This interaction causes the particles to spiral along the magnetic field lines towards the polar regions. As the particles collide with atoms and molecules in the Earth's atmosphere, they emit light, creating the beautiful and colorful display of the Aurora Borealis.Rate this question:
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- 10.
A compass reads the Earth's magnetic field. Does a compass function the same when south of the Earth's equator as when north of the equator?
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Yes, it will always point to magnetic south
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No, it will point in the opposite direction
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Yes, it will always point to magnetic north.
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No, it will change direction when Earth's magnetic field changes strength
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None of the above
Correct Answer
A. Yes, it will always point to magnetic north.Explanation
When using a compass, it will always point towards the Earth's magnetic north regardless of the location on the Earth's surface. The Earth's magnetic field creates a magnetic north pole near the geographic North Pole, and a compass aligns itself with this magnetic field. Therefore, whether the compass is used north or south of the equator, it will still point towards magnetic north.Rate this question:
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- 11.
When was Michael Joseph Jackson (The King of Pop) born?
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June 9,1995
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March 32, 1728
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What does this have to do with magnetism?
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August 29, 1958
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None of the above
Correct Answer
A. August 29, 1958 -
- 12.
In which of these environments would a compass work normally?
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In a lightning storm
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Underwater
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In orbit around the earth
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In the magnetic north pole
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None of the above
Correct Answer
A. UnderwaterExplanation
A compass works by aligning itself with the Earth's magnetic field, specifically pointing towards the magnetic north pole. In underwater environments, the Earth's magnetic field is still present and unaffected, allowing a compass to work normally. However, in a lightning storm, the strong electrical currents can interfere with the compass needle, causing it to malfunction. In orbit around the Earth, there is no direct connection to the Earth's magnetic field, so a compass would not work. Similarly, in the magnetic north pole, the magnetic field is so strong and constantly changing that it can disrupt the functioning of a compass.Rate this question:
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Mar 21, 2023Quiz Edited by
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May 17, 2010Quiz Created by
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