The magnetic force acting on a unit +ve charge moving at right angle to the magnitude field with unit velocity is called:
Correct answer: D. Magnetic induction
- A. Magnetic flux
- B. Motional emf
- C. Induced emf
- D. Magnetic induction
Explanation
The magnetic force on a charge moving in a magnetic field is given by: F=qv×BMagnetic induction is defined as the magnetic force per unit positive charge moving with unit velocity perpendicular to the magnetic field.For a unit positive charge (q=1) moving perpendicular to the field (θ=90o) with unit velocity (v=1): F=qvBsinθ=1so,B=sin90oTherefore, the magnetic force experienced by this unit charge is equal to the magnetic induction, which is exactly the definition of magnetic induction.
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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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