Concept explainers
A charged particle moves through a region containing only a magnetic field. Under what condition will it experience no force?
The condition when an electron will not experience a force in a magnetic field.
Answer to Problem 1FTD
An electron will not experience any force in a magnetic field when the particle is moving either parallel or antiparallel to the direction of field.
Explanation of Solution
Write the equation to find the force acting on a particle in magnetic field.
Here,
The force becomes zero when the sine term becomes zero. For sine term to be zero the angle
Therefore the force acting on a particle becomes zero only when the particle is moving parallel or antiparallel to the direction of magnetic field.
Conclusion:
Therefore, an electron will not experience any force in a magnetic field when the particle is moving either parallel or antiparallel to the direction of field.
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