Table of contents
- 0. Math Review(0)
- 1. Intro to Physics Units(0)
- 2. 1D Motion / Kinematics(0)
- Vectors, Scalars, & Displacement(0)
- Average Velocity(0)
- Intro to Acceleration(0)
- Position-Time Graphs & Velocity(0)
- Conceptual Problems with Position-Time Graphs(0)
- Velocity-Time Graphs & Acceleration(0)
- Calculating Displacement from Velocity-Time Graphs(0)
- Conceptual Problems with Velocity-Time Graphs(0)
- Calculating Change in Velocity from Acceleration-Time Graphs(0)
- Graphing Position, Velocity, and Acceleration Graphs(0)
- Kinematics Equations(0)
- Vertical Motion and Free Fall(0)
- Catch/Overtake Problems(0)
- 3. Vectors(0)
- Review of Vectors vs. Scalars(0)
- Introduction to Vectors(0)
- Adding Vectors Graphically(0)
- Vector Composition & Decomposition(0)
- Adding Vectors by Components(0)
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- Unit Vectors(0)
- Introduction to Dot Product (Scalar Product)(0)
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- 21. Kinetic Theory of Ideal Gases(0)
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- 29. Sources of Magnetic Field(0)
- Magnetic Field Produced by Moving Charges(0)
- Magnetic Field Produced by Straight Currents(0)
- Magnetic Force Between Parallel Currents(0)
- Magnetic Force Between Two Moving Charges(0)
- Magnetic Field Produced by Loops and Solenoids(0)
- Toroidal Solenoids aka Toroids(0)
- Biot-Savart Law (Calculus)(0)
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- RMS Current and Voltage(0)
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- 32. Electromagnetic Waves(0)
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28. Magnetic Fields and Forces
Magnets and Magnetic Fields
28. Magnetic Fields and Forces
Magnets and Magnetic Fields: Study with Video Lessons, Practice Problems & Examples
Back to all problems
11PRACTICE PROBLEM
A beam of electrons (charge e = -1.60 × 10-19 C, mass 9.11 × 10-31 kg) is accelerated from rest through a potential difference of 2.0 kV and enters the region between two parallel metal plates perpendicular to the electric field. The plates have an area of 35.0 cm² and are separated by 5.0 mm, with a 200-V battery connected across them. To make sure the beam of electrons is undeflected from between the plates, a magnetic field is applied perpendicular to the electric field between the plates. Determine the magnitude and direction of the magnetic field.
A beam of electrons (charge e = -1.60 × 10-19 C, mass 9.11 × 10-31 kg) is accelerated from rest through a potential difference of 2.0 kV and enters the region between two parallel metal plates perpendicular to the electric field. The plates have an area of 35.0 cm² and are separated by 5.0 mm, with a 200-V battery connected across them. To make sure the beam of electrons is undeflected from between the plates, a magnetic field is applied perpendicular to the electric field between the plates. Determine the magnitude and direction of the magnetic field.