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Which property of a proton can change while it moves freely in a magnetic field?
  • a)
    mass
  • b)
    speed
  • c)
    velocity
  • d)
    momentum
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Which property of a proton can change while it moves freely in a magn...
When a proton moves freely in a magnetic field, its velocity can change. This change occurs due to the interaction between the magnetic field and the moving charge, leading to alterations in the proton's direction and speed.
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Which property of a proton can change while it moves freely in a magn...
Understanding Proton Behavior in a Magnetic Field
When a proton moves freely in a magnetic field, certain properties can be affected. Among the options provided, it is crucial to identify which of these can change.
Key Properties of the Proton:
- Mass: The mass of a proton remains constant regardless of its motion or the presence of a magnetic field. It is an intrinsic property of the particle.
- Speed: While a proton's speed can remain constant, it can change depending on external forces acting on it. However, in a uniform magnetic field, the speed does not inherently change due to the field itself.
- Velocity: This is the correct answer. Velocity is a vector quantity that includes both speed and direction. When a proton enters a magnetic field, it experiences a force (Lorentz force) that alters its direction of motion. Thus, while its speed might remain constant, its velocity changes due to the change in direction.
- Momentum: The momentum of a proton (mass times velocity) can also change as a consequence of the change in velocity. However, it is not a direct change in the property itself but rather a result of the change in velocity.
Conclusion:
In summary, as a proton moves freely in a magnetic field, the only property that changes is its velocity due to the alteration in direction caused by the magnetic force. This fundamental understanding is key for applications in fields like particle physics and electromagnetism.
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