What is true regarding magnetic force and magnetic intensity?
Correct answer: D. If an electron enters perpendicular to the field force will be maximum
- A. If an electron's movement is parallel to the magnetic field. it will rotate
- B. If the electron's movement is parallel to the magnetic field, it will rotate anticlockwise
- C. If an electron enters perpendicular to the field force it would be parallel to the plane
- D. If an electron enters perpendicular to the field force will be maximum
Explanation
If an electron enters perpendicular to the field, the force will be maximum, because according to theformula of force on a moving chargeF=Bqv Sinθ Where F is the force on moving charge, B is the magnetic field strength, q is the magnitude of chargeand θ is the angle between direction of moving charge and the magnetic field.Sin (θ) is maximum at 90° because Sin (90) = 1. Therefore, when an electron enters perpendicular to themagnetic field, the force will be maximum.There will be no force on the electron if it is moving parallel to the magnetic field.SO OPTION A B AND C ARE INCORRECT To find the direction of magnetic force on the electron, we will also need the direction of the 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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