Magnetic force acting on a unit positive charge moving perpendicular to the magnetic field with a unit velocity is called____________________?
Correct answer: C. magnetic induction
- A. magnetic flux
- B. magnetic field intensity
- C. magnetic induction
- D. self inductance
Explanation
From F = qvB for perpendicular motion, B = F/(qv). For a unit positive charge and unit velocity, B equals the magnetic force numerically, so this quantity is magnetic induction or magnetic flux density. Students may choose b because magnetic field intensity sounds similar, but field intensity is represented by H and is not defined by this force relation.
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About Magnetic Flux Density
Magnetic flux density measures the magnetic force acting on a current carrying conductor or moving charge in a magnetic field. Work includes the relations B equals F divided by IL and F equals qvB, the tesla as its SI unit, field direction and the distinction between flux density and magnetic flux.
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