7.8 - Conclusion
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Practice Questions
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What is the relationship between electric current and magnetic fields?
💡 Hint: Think about what happens when you pass current through a wire.
Define a solenoid in simple terms.
💡 Hint: Consider its shape and what it does.
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Interactive Quizzes
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What is created around a current-carrying conductor?
💡 Hint: Think about what a compass needle would do around a wire with current.
True or False: A solenoid only works with constant direct current.
💡 Hint: Consider how voltages can be alternated.
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Challenge Problems
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A solenoid is wound with 100 turns and carries a current of 2A. What magnetic field strength does it produce at its center?
💡 Hint: Use the constant values for μ₀ and rearrange the equation according to the number of loops and current.
An electric motor uses a coil with a magnetic field of 0.5T. If the current is increased to 3A, what would be the new strength of the magnetic field assuming a linear relationship?
💡 Hint: Consider how an increase in current affects the magnetic field strength.
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