Physics SL
Physics SL
5
Chapters
329
Notes
Theme A - Space, Time & Motion
Theme A - Space, Time & Motion
Theme B - The Particulate Nature Of Matter
Theme B - The Particulate Nature Of Matter
Theme C - Wave Behaviour
Theme C - Wave Behaviour
Theme D - Fields
Theme D - Fields
Theme E - Nuclear & Quantum Physics
Theme E - Nuclear & Quantum Physics
IB Resources
Theme D - Fields
Physics SL
Physics SL

Theme D - Fields

Electron Dynamics In Uniform Electric Fields: A Deep Dive

Word Count Emoji
616 words
Reading Time Emoji
4 mins read
Updated at Emoji
Last edited on 5th Nov 2024

Table of content

Understanding the Basics 🔍

  • Imagine an electron moving horizontally between two charged parallel plates.
  • Top plate: +V potential.
  • Bottom plate: 0 potential (zero potential).
  • This creates a uniform electric field pointing downwards.

💡 Real-World Example: Think of it like a car entering a wind tunnel. In the tunnel, the wind (electric field) pushes the car (electron) in a specific direction.

How does the Electron Respond? 🔋

  • The electric field pulls positively charged objects downwards. But for our negative electron, it's pushed upwards!
  • Because this field is everywhere the same (uniform), the force on our electron is also constant.
  • What does this lead to? Constant acceleration! Just like how a car accelerates when you press the gas pedal consistently.

Using Familiar Physics 🧐

  • Kinematic equations & Newton’s 2nd Law help us break this down.
  • Electric Field Strength, E = V/d (where d is distance between plates).
  • Vertical acceleration of the electron:
  • \(^avertical = \frac {qE}{m_e} = \frac {qV}{m_e × d}\)
  • where me​ is the mass of the electron.
  • Horizontally, our electron is chill. Its speed doesn’t change.

💡 Cool Fact: If the electron stays between the plates for a time 't', then:
\(t = \frac {X}{^vnorizontal}\)
Where 'X' is the length of the plates.

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IB Resources
Theme D - Fields
Physics SL
Physics SL

Theme D - Fields

Electron Dynamics In Uniform Electric Fields: A Deep Dive

Word Count Emoji
616 words
Reading Time Emoji
4 mins read
Updated at Emoji
Last edited on 5th Nov 2024

Table of content

Understanding the Basics 🔍

  • Imagine an electron moving horizontally between two charged parallel plates.
  • Top plate: +V potential.
  • Bottom plate: 0 potential (zero potential).
  • This creates a uniform electric field pointing downwards.

💡 Real-World Example: Think of it like a car entering a wind tunnel. In the tunnel, the wind (electric field) pushes the car (electron) in a specific direction.

How does the Electron Respond? 🔋

  • The electric field pulls positively charged objects downwards. But for our negative electron, it's pushed upwards!
  • Because this field is everywhere the same (uniform), the force on our electron is also constant.
  • What does this lead to? Constant acceleration! Just like how a car accelerates when you press the gas pedal consistently.

Using Familiar Physics 🧐

  • Kinematic equations & Newton’s 2nd Law help us break this down.
  • Electric Field Strength, E = V/d (where d is distance between plates).
  • Vertical acceleration of the electron:
  • \(^avertical = \frac {qE}{m_e} = \frac {qV}{m_e × d}\)
  • where me​ is the mass of the electron.
  • Horizontally, our electron is chill. Its speed doesn’t change.

💡 Cool Fact: If the electron stays between the plates for a time 't', then:
\(t = \frac {X}{^vnorizontal}\)
Where 'X' is the length of the plates.

Unlock the Full Content! File Is Locked Emoji

Dive deeper and gain exclusive access to premium files of Physics SL. Subscribe now and get closer to that 45 🌟

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