4.2.1 - Sources and fields
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Practice Questions
Test your understanding with targeted questions
What is an electric field?
💡 Hint: Remember the source of the force.
Who discovered that electric current affects magnets?
💡 Hint: Think of the experiment with the compass.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What does the Lorentz force describe?
💡 Hint: Consider both types of fields.
Are magnetic field lines closed loops?
💡 Hint: Think of how they connect back.
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Challenge Problems
Push your limits with advanced challenges
Two parallel wires carry currents of 5 A and 10 A respectively. Calculate the force per unit length between the two wires if they are 0.1 m apart.
💡 Hint: Make sure to convert units where necessary.
Explain qualitatively why the Lorentz force can cause charged particles to move in circular paths in magnetic fields.
💡 Hint: Connect to your knowledge about centripetal forces in mechanics.
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