When a charge passes through a region undeflected then with Fe = Fm.
Correct answer: B. B ⊥ E
- A. B =zero
- B. B ⊥ E
- C. Both Options A and B are correct
- D. None of these options is correct
Explanation
Given that, Fe = Fm, which means the electric force is equal to magnetic force, Then Fe = -Fm. qE = -q( v x B), where E = v x B. In this case, v is parallel to E and "E is perpendicular to B".
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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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