Practice Magnetic Field On The Axis Of A Circular Coil (3.2.4) - Magnetic Effect of Current and Magnetism

Practice: Magnetic Field on the Axis of a Circular Coil

Lesson 3.2.4Magnetic Effect of Current and Magnetism

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8 questions

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Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
2 questions · about 1 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is the formula for the magnetic field at the center of a circular coil?
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Think about what happens when x equals zero.
Question 2.
What physical entity generates a magnetic field in a circular coil?
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Recall the relationship between electricity and magnetism.
3Question 3.
What is the magnetic field at the center of a circular coil with radius R carrying current I?
- \\frac{\\mu_0 I}{R^2}
- \\frac{\\mu_0 I}{2R}
- \\frac{\\mu_0 I R^2}{2(R^2 + x^2)^{3/2}}
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Remember when x is zero; what happens to the formula?
4Question 4.
True or False: The magnetic field decreases linearly with distance from a coil.
- True
- False
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Think about how physical forces behave with distance.
Question 5.
A circular coil of radius 0.2 m carries a current of 0.5 A. Calculate the magnetic field strength at 0.1 m from the center along the axis, and explain how real-world applications of this field might differ based on the distance from the coil.
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Make sure to substitute the values carefully!
Question 6.
Design an electromagnet using a circular coil of wire. Explain the parameters you would adjust to increase the magnetic field strength and why these adjustments are effective.
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Consider both the physical properties of the coil and the electrical supply.

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