The horizontal component of Earth magnetic flux density is 1.8 x 10^-6 T. The current in a horizontal cable is 160 A. Calculate the maximum force per unit length?
Correct answer: B. 2.88 x 10^-4 N/m
- A. 2.88 x 10^-6 N/m
- B. 2.88 x 10^-4 N/m
- C. 2.88 x 10^-2 N/m
- D. 2.88 x 10^-8 N/m
Explanation
Force/Length = Magnetic Flux density x Current x sin(θ)For maximum force, sin(θ) = 1. Putting in the values gives us the answer.
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About Electromagnetism
Magnetic flux density and magnetic flux describe the strength of a magnetic field and the field passing through a surface. A charged particle moving through a magnetic field experiences a force perpendicular to its velocity and may follow circular or helical motion, depending on the angle between velocity and field.
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