Question

A particle enters a magnetic field perpendicularly and goes undeviated, (there is no other field present) then this paticle must be

Answer 1

Answer:

The magnetic force experienced by a charged particle Q moving with velocity  v at any angle is-

                          F = Q [V×B]

Here B  is the strength of magnetic field.

As per the question, the particle enters at right angle to the magnetic field.

Hence, the force experienced by the particle will be F= QVB   [sin90=1]

The trajectory of the particle should be circular.

But, here, the particle is undeviated. It means the particle is not experiencing any force .It will be only possible if the particle is a neutral particle.

Hence, the particle may be neutron or any other charge less particle.

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