Physics
Grade-10
Easy
Question
A charged particle moves at a velocity v in a uniform magnetic field B. The magnetic force experienced by the particle is
- Always zero
- Zero, if B and v are perpendicular to each other
- Zero, if B and v are parallel
- Never zero
Hint:
Zero, if B and v are parallel
The correct answer is: Zero, if B and v are parallel
The force experienced by a charged particle moving in a magnetic field is given by: F=qvBsinø
If the particle moves in a direction parallel to the magnetic field, then ø=0°
Thus, the force experienced by the particle is given by:
F=qvBsin0°
Thus, F=0 N
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