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A positively charged particle moving due east enters a region of uniform magnetic field directed vertically upwards. The particle will

Correct answer: B. Move in a circular orbit with its speed unchanged

  • A. Continue to move due east
  • B. Move in a circular orbit with its speed unchanged
  • C. Move in a circular orbit with its speed increases
  • D. Get deflected vertically upwards

Explanation

Option B is correct.According to F=q(vxB) In perpendicular magnetic field, the path of a charged particle is a circle, and the magnetic field does not cause any change in speed and energy. ORF=q( V × B ), Using the fleming's left had rule, Direction of force will be due north perpendicular to velocity, so the motion will be circular with uniform speed.

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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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