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A charged particle moves in a magnetic field. What is the path of the particle i

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Question: A charged particle moves in a magnetic field. What is the path of the particle if it enters the field perpendicular to the lines of force? (2019)

Options:

  1. Straight line
  2. Circular path
  3. Elliptical path
  4. Parabolic path

Correct Answer: Circular path

Exam Year: 2019

Solution: 

A charged particle moving perpendicular to the magnetic field will follow a circular path due to the magnetic force acting as a centripetal force.

A charged particle moves in a magnetic field. What is the path of the particle i

Practice Questions

Q1
A charged particle moves in a magnetic field. What is the path of the particle if it enters the field perpendicular to the lines of force? (2019)
  1. Straight line
  2. Circular path
  3. Elliptical path
  4. Parabolic path

Questions & Step-by-Step Solutions

A charged particle moves in a magnetic field. What is the path of the particle if it enters the field perpendicular to the lines of force? (2019)
  • Step 1: Understand that a charged particle is an object with an electric charge, like an electron or a proton.
  • Step 2: Recognize that a magnetic field is an area around a magnet where magnetic forces can be felt.
  • Step 3: Know that when a charged particle enters a magnetic field, it experiences a force due to the magnetic field.
  • Step 4: If the charged particle enters the magnetic field at a right angle (perpendicular) to the magnetic field lines, the force will act sideways, not forward.
  • Step 5: This sideways force causes the particle to change direction continuously, making it move in a circular path.
  • Step 6: The magnetic force acts as a centripetal force, which keeps the particle moving in a circle.
  • Magnetic Force on Charged Particles – A charged particle experiences a magnetic force when moving through a magnetic field, which is perpendicular to both the velocity of the particle and the magnetic field lines.
  • Centripetal Motion – The magnetic force acts as a centripetal force, causing the particle to move in a circular path when it enters the magnetic field perpendicularly.
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