E/m of an electron is given by the relationship.
Correct answer: D. e/m=2V/B2r2
- A. e/m2(VB2r2)
- B. e/m=(V/Br)2
- C. e/m=V.r/B
- D. e/m=2V/B2r2
Explanation
The E/m (charge-to-mass ratio) of an electron is given by the formula:em=2V/B2r2 where:e = charge of electronm = mass of electronV = accelerating potential (voltage)B = magnetic field strengthr = radius of the circular path of the electron👉 This relationship comes from balancing the centripetal force and magnetic force on an electron moving in a circular path.
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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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