Electricity and Magnetism Concepts

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Questions and Answers

The potential difference between two points in a circuit, measured in volts, is called ______

Voltage

A device that increases or decreases the voltage of an alternating current is called a ______

Transformer

A circuit in which all parts are connected in a single loop is called a ______

Series circuit

A circuit in which different parts are on separate branches is called a ______

<p>Parallel circuit</p> Signup and view all the answers

A device that converts mechanical energy into electrical energy is called a ______

<p>Electric generator</p> Signup and view all the answers

A magnet created by passing an electric current through a coil of wire is called an ______

<p>Electromagnet</p> Signup and view all the answers

The interaction between electricity and magnetism is called ______

<p>Electromagnetism</p> Signup and view all the answers

What is the difference between nuclear fission and nuclear fusion?

<p>Fission splits a large nucleus into smaller ones, while fusion combines small nuclei into a larger one.</p> Signup and view all the answers

How does a nuclear power plant control a chain reaction?

<p>It uses control rods to absorb excess neutrons and regulate the reaction.</p> Signup and view all the answers

Why do electric field lines never cross?

<p>Each point in space has only one direction of the electric field, so lines cannot cross.</p> Signup and view all the answers

How do conductors and insulators differ?

<p>Conductors allow electric charges to move freely, while insulators resist the movement of charges.</p> Signup and view all the answers

What causes lightning?

<p>Lightning is an electric discharge caused by the buildup and sudden movement of electric charge in clouds.</p> Signup and view all the answers

How does increasing resistance affect an electric circuit?

<p>Higher resistance reduces the flow of electric current.</p> Signup and view all the answers

What is the function of a transformer in an electrical system?

<p>A transformer changes the voltage of alternating current, either increasing or decreasing it.</p> Signup and view all the answers

How does a parallel circuit differ from a series circuit?

<p>A parallel circuit provides multiple paths for current, while a series circuit has only one path.</p> Signup and view all the answers

What role do electromagnets play in electric motors?

<p>Electromagnets create a magnetic field that interacts with a permanent magnet to produce motion.</p> Signup and view all the answers

Why is AC used in power transmission instead of DC?

<p>AC can be easily transformed to higher or lower voltages for efficient power transmission.</p> Signup and view all the answers

A wave is any disturbance that transmits ______ through matter or space.

<p>Energy</p> Signup and view all the answers

The material through which a wave travels is called a ______

<p>Medium</p> Signup and view all the answers

A wave that requires a medium to travel is called what type of wave?

<p>Mechanical</p> Signup and view all the answers

Electromagnetic waves do not require what to travel?

<p>Medium</p> Signup and view all the answers

Waves that move the particles of the medium perpendicular to the direction the wave is traveling are called ______ waves.

<p>Transverse</p> Signup and view all the answers

The highest point of a transverse wave is called the ______

<p>Crest</p> Signup and view all the answers

A wave in which particles move parallel to the direction of the wave is called a ______ wave.

<p>Longitudinal</p> Signup and view all the answers

The areas where particles are close together in a longitudinal wave are called ______

<p>Compressions</p> Signup and view all the answers

The areas where particles are spread apart in a longitudinal wave are called ______

<p>Rarefactions</p> Signup and view all the answers

The number of waves that pass a given point in a certain amount of time is called ______

<p>Frequency</p> Signup and view all the answers

The distance between two corresponding parts of a wave is called ______

<p>Wavelength</p> Signup and view all the answers

The maximum distance that the particles of a medium move from their rest position is called ______

<p>Amplitude</p> Signup and view all the answers

The bouncing back of a wave when it hits a surface it cannot pass through is called ______

<p>Reflection</p> Signup and view all the answers

The bending of waves due to a change in speed as they move from one medium to another is called ______

<p>Refraction</p> Signup and view all the answers

The bending of waves around the edge of a barrier is called ______

<p>Diffraction</p> Signup and view all the answers

When two waves meet and combine to form a wave of greater amplitude, this is called ______ interference.

<p>Constructive</p> Signup and view all the answers

A frequency shift that occurs when a sound source moves relative to a listener is called the ______

<p>Doppler Effect</p> Signup and view all the answers

A loud sound heard when an object travels faster than the speed of sound is called a ______

<p>Sonic Boom</p> Signup and view all the answers

What happens to the speed of sound as the temperature of the medium increases?

<p>It increases because the particles move faster and transfer energy more quickly.</p> Signup and view all the answers

Flashcards

Voltage

Potential difference between two points; measured in volts.

Transformer

Device that increases or decreases AC voltage.

Series Circuit

Circuit with all components in a single path.

Parallel Circuit

Circuit with components on separate branches.

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Electric Generator

Device converting mechanical energy to electrical energy.

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Electromagnet

Magnet created by electric current in a coil.

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Electromagnetism

Interaction of electricity and magnetism.

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Nuclear Fission

Splitting a large nucleus into smaller ones.

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Nuclear Fusion

Combining small nuclei into a larger one.

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Control Rods (Nuclear)

Absorb neutrons to control reaction rate.

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Unique Field Direction

Why electric field lines don't cross

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Conductors

Allow free charge movement.

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Insulators

Resist charge movement.

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Lightning

Electric discharge from charged clouds.

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Effect of Increasing Resistance

Reduces current flow in a circuit.

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Transformer Function

Changes AC voltage up or down.

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Parallel Circuit Characteristic

Multiple current paths.

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Series Circuit Characteristic

One current path only.

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Electromagnets in Motors

Create motion via magnetic field interaction.

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Why AC for Power Transmission

Easily changed for efficient transmission.

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Wave

Transfer of energy through matter or space.

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Medium

Material through which a wave travels.

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Mechanical Wave

Wave requiring a medium to travel.

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Electromagnetic Waves Don't Need This

Space, vacuum.

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Transverse Wave

Particles move perpendicular to wave direction.

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Crest (Wave)

Highest point of a transverse wave.

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Trough (Wave)

Lowest point of a transverse wave.

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Longitudinal Wave

Particles move parallel to wave direction.

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Compressions (Wave)

Areas of high density in a longitudinal wave.

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Rarefactions (Wave)

Areas of low density in a longitudinal wave.

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Study Notes

  • Voltage is the potential difference between two points in a circuit, measured in volts
  • A transformer increases or decreases the voltage of an alternating current
  • A series circuit connects all parts in a single loop
  • A parallel circuit has parts on separate branches
  • An electric generator converts mechanical energy into electrical energy
  • An electromagnet is created by passing an electric current through a coil of wire
  • Electromagnetism is the interaction between electricity and magnetism
  • Nuclear fission splits a large nucleus into smaller ones
  • Nuclear fusion combines small nuclei into a larger one
  • Nuclear power plants use control rods that absorb excess neutrons to control a chain reaction and regulate the reaction
  • Electric field lines never cross because each point in space has only one direction
  • Conductors allow electric charges to move freely
  • Insulators resist the movement of charges
  • Lightning is an electric discharge from the buildup and sudden movement of electric charge in clouds
  • Higher resistance reduces the flow of electric current in an electric circuit
  • Transformers change the voltage of alternating current
  • Parallel circuits provide multiple paths for current
  • Series circuits have only one path
  • Electromagnets in electric motors create a magnetic field to interact with a permanent magnet for motion
  • Alternating current (AC) is used in power transmission because it can be easily transformed to higher or lower voltages for efficient power transmission
  • A wave transmits energy through matter or space
  • A medium is the material through which a wave travels
  • Mechanical waves require a medium
  • Electromagnetic waves do not require a medium
  • Transverse waves move the particles of the medium perpendicular to the direction of the wave
  • The crest is the highest point of a transverse wave
  • The trough is the lowest point of a transverse wave
  • Longitudinal waves move particles parallel to the direction of the wave
  • Compressions are the areas where particles squeeze together in a longitudinal wave
  • Rarefactions are the areas where particles spread apart in a longitudinal wave
  • Frequency measures the number of waves passing a point in a certain amount of time
  • Wavelength is the distance between two corresponding parts of a wave
  • Amplitude is the maximum distance that the particles of a medium move from their rest position
  • Reflection occurs when a wave bounces back from a surface it cannot pass through
  • Refraction occurs when waves bend due to a change in speed when moving from one medium to another
  • Diffraction occurs when waves bend around the edge of a barrier
  • Constructive interference occurs when waves combine to form a wave of greater amplitude
  • Destructive interference occurs when waves combine to form a wave of smaller amplitude
  • Doppler Effect: A frequency shift occurs when a sound source moves relative to a listener
  • Sonic Boom: A loud sound heard when an object travels faster than the speed of sound
  • Increased temperature increases the speed of sound because particles move faster and transfer energy more quickly

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