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Questions and Answers
Which action demonstrates the fundamental principle of electromagnetism?
Which action demonstrates the fundamental principle of electromagnetism?
- Heating a metal to observe thermal expansion.
- Using a prism to split white light into a spectrum.
- Utilizing magnets to generate an electric current. (correct)
- Creating sound waves through mechanical vibrations.
What observation confirms the presence of a magnetic field around a current-carrying wire?
What observation confirms the presence of a magnetic field around a current-carrying wire?
- The wire changes color.
- The wire emits a high-pitched sound.
- The wire's temperature increases visibly.
- A nearby compass needle deflects. (correct)
What is the underlying cause of the magnetic field produced by a current-carrying wire?
What is the underlying cause of the magnetic field produced by a current-carrying wire?
- The insulation material around the wire.
- The protons moving through the wire.
- The friction between electrons and the wire's material.
- Electrons spinning in the same direction as they flow. (correct)
Using the right-hand rule, if the electric current is flowing away from you into the page, what is the direction of the magnetic field?
Using the right-hand rule, if the electric current is flowing away from you into the page, what is the direction of the magnetic field?
What does a 'dot' inside a loop of wire typically represent regarding the magnetic field?
What does a 'dot' inside a loop of wire typically represent regarding the magnetic field?
What happens to the magnetic field inside a loop of wire when the direction of the current changes from clockwise to anti-clockwise?
What happens to the magnetic field inside a loop of wire when the direction of the current changes from clockwise to anti-clockwise?
If a loop of wire carries a current in a clockwise direction, what is the direction of the magnetic field inside the loop?
If a loop of wire carries a current in a clockwise direction, what is the direction of the magnetic field inside the loop?
What term describes a coil of wire loops specifically designed to enhance the magnetic field it produces?
What term describes a coil of wire loops specifically designed to enhance the magnetic field it produces?
When holding a solenoid in your right hand with your fingers curled in the direction of the electric current, what does your thumb indicate?
When holding a solenoid in your right hand with your fingers curled in the direction of the electric current, what does your thumb indicate?
Inside a solenoid, what is the direction of the magnetic field?
Inside a solenoid, what is the direction of the magnetic field?
If you reverse the direction of the current in a solenoid, what happens to its magnetic field?
If you reverse the direction of the current in a solenoid, what happens to its magnetic field?
Outside a solenoid, in which direction does the magnetic field wrap?
Outside a solenoid, in which direction does the magnetic field wrap?
What adjustment could most effectively increase the electromagnetic force of a solenoid?
What adjustment could most effectively increase the electromagnetic force of a solenoid?
If electrons in a wire began spinning in random directions instead of aligning, what would happen to the magnetic field around the wire?
If electrons in a wire began spinning in random directions instead of aligning, what would happen to the magnetic field around the wire?
A wire carries a current towards the east. According to the right-hand rule, which direction would the magnetic field point directly above the wire?
A wire carries a current towards the east. According to the right-hand rule, which direction would the magnetic field point directly above the wire?
A circular loop of wire is oriented so that it lies flat on a table. If a clockwise current runs through the wire, what is the direction of the magnetic field at the center of the loop?
A circular loop of wire is oriented so that it lies flat on a table. If a clockwise current runs through the wire, what is the direction of the magnetic field at the center of the loop?
Consider a long solenoid. If you could 'see' the magnetic field lines, where would they be most concentrated?
Consider a long solenoid. If you could 'see' the magnetic field lines, where would they be most concentrated?
What effect would inserting an iron core inside a current-carrying solenoid have on its magnetic field?
What effect would inserting an iron core inside a current-carrying solenoid have on its magnetic field?
A solenoid is used to lift a metallic object. If the object is observed to fall when the current is reduced, what does this indicate about the relationship between the current and the solenoid's lifting power?
A solenoid is used to lift a metallic object. If the object is observed to fall when the current is reduced, what does this indicate about the relationship between the current and the solenoid's lifting power?
How does the behavior of electrons spinning in the same direction contribute to the phenomenon observed in electromagnetism?
How does the behavior of electrons spinning in the same direction contribute to the phenomenon observed in electromagnetism?
Flashcards
Electromagnetism
Electromagnetism
Using magnets to produce electricity.
Magnetic Field
Magnetic Field
The area around a magnet or current-carrying wire where magnetic force is exerted.
Magnetic Field
Magnetic Field
Electricity flowing through a wire creates this around it.
Right Hand Rule
Right Hand Rule
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Anti-Clockwise
Anti-Clockwise
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Clockwise
Clockwise
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Solenoid
Solenoid
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Solenoid
Solenoid
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Solenoid
Solenoid
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Into the Page
Into the Page
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Out of the Page
Out of the Page
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Solenoid
Solenoid
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