If a certain region's magnetic field is directed vertically up and a proton enters this field from the left side, it will go _.
Correct answer: D. Towards us
- A. Up
- B. Down
- C. Right
- D. Towards us
Explanation
The correct answer is D. When a proton enters a magnetic field vertically upward from the left side, it experiences a force perpendicular to both the field and its velocity. By applying the right-hand rule, where your fingers point in the direction of the magnetic field (up) and your thumb in the direction of the proton's velocity (right), your palm faces towards you, indicating the direction of the force. Thus, the proton will be deflected towards us, out of the paper.Options A, B, and C are incorrect because they do not account for the perpendicular nature of the magnetic force as predicted by the right-hand rule. The force is not in the direction of the magnetic field (up), nor opposite (down), nor in the initial velocity direction (right).
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About Charged Particle in a Magnetic Field
A charged particle moving through a magnetic field experiences the Lorentz force, which is perpendicular to both its velocity and the field. The motion may be circular or helical, with questions involving radius, angular frequency, time period, and work done. A stationary charge feels no magnetic force.
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