A unit of induction is said to exist at a point where the force per unit charge experienced by a positive test charge, moving with a velocity of 1ms-1 in the direction perpendicular to the field is 1 Newton. What is this phenomenon called?
Correct answer: B. Magnetic Field
- A. Gravitational Field
- B. Magnetic Field
- C. Magnetic Flux
- D. Flux
Explanation
The correct answer is Magnetic Field. A magnetic field is defined by the force it exerts on moving charges. In this question, the force per unit charge experienced by a test charge moving perpendicularly to the field indicates the presence of a magnetic field. The force is proportional to the velocity of the charge and the strength of the magnetic field.Option A (Gravitational Field) is incorrect because it deals with forces due to gravity, not magnetic forces.Option C (Magnetic Flux) is incorrect because it describes the number of magnetic field lines passing through a surface, not the force on a moving charge.Option D (Flux) is too general and does not specifically relate to magnetic fields affecting moving charges.
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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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