An electron travels due north through a vacuum in a region of uniform magnetic field B that is also directed due north. It will:
Correct answer: A. Be unaffected by the field
- A. Be unaffected by the field
- B. Slow down
- C. Speed up
- D. Follow a right-handed corkscrew path
Explanation
When an electron travels due north through a region of uniform magnetic field B that is also directed due north, the electron will not experience any deflection or force due to the magnetic field acting on its motion in the north direction.This is because the force experienced by a charged particle moving in a magnetic field depends on the cross product of the velocity of the particle and the magnetic field. In this case, since both the velocity (due north) and the magnetic field direction (due north) are parallel, the angle θ between them is 0 degrees. As a result, sin(0) is equal to 0, and the magnetic force acting on the electron is also 0.In summary, the electron will continue to travel due north without any deflection or change in its path due to the uniform magnetic field in the same direction.
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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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