STANDARDPhysics-Moving Charges and Magnetism
STANDARD Physics Lorentz Force MCQ Question
Type: MCQ-conceptual-Medium-Class 12
Which one of the following is not correct about Lorentz Force?
A
In presence of electric field E(r) and magnetic field B(r) the force on a moving electric charge is F = q[E(r) + v × B(r)].
B
The force, due to magnetic field on a negative charge is opposite to that on a positive charge.
C
The force due to magnetic field becomes zero if velocity and magnetic field are parallel or antiparallel.
D
For a static charge the magnetic force is maximum.
Correct Answer
Option D
Detailed Explanation
If charge is not moving then the magnetic force is zero. Since Fₘ = q(v × B) and as v = 0 for stationary charge, Fₘ = 0.
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