A strong magnetic field is applied to a stationary electron, then
Correct answer: D. Electron remain stationary
- A. Electron move in the direction of field
- B. Electron move opposite to field
- C. Electron start spinning
- D. Electron remain stationary
Explanation
Option D is correct. A stationary electron will remain stationary in a strong magnetic field. This is because the magnetic force on a charged particle is given by the following equation: F = qvB sin θ where: θ is the angle between the direction of the velocity and the direction of the magnetic field (°) If the electron is stationary, then the velocity is zero and the magnetic force is zero. Here is a mathematical explanation: If the velocity of the electron is zero, then the angle between the velocity and the magnetic field is 0°. For this to happen, the condition is sinθ=0° The maximum value of sine function is 1. When the sine function is zero, the value of the force also becomes zero. Therefore, a stationary electron will remain stationary in a strong magnetic field.
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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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