Question

A particle of mass m,charge q and kinetic energy is 10j enters a transverse uniform magnetic field b after 5sec the ke of the particle will be

Answer 1

Answer:

Answer

Correct option is

C

T

after passing through a magnetic field, the magnitude of its mass and velocity of the particle remains same, so its energy does not change that is kinetic energy will remain T.

Hence (C) is correct answer

Answer 2

The particle's kinetic energy is 10 J after 5 seconds in a uniform magnetic field.

Given:

Mass, m

Charge, q

Kinetic energy, k = 10J

Time, t = 5 s

Uniform magnetic field (b)

To Find:

The kinetic energy of the particle after 5 seconds.

Solution:

We are required to find the particle's kinetic energy after 5 seconds in a uniform magnetic field

• When a particle passes through the uniform magnetic field (b) then the magnitude of mass and velocity does not change.
• The kinetic energy of the particle is 1/2mv².
• So, When the magnitude of mass and velocity does not change then the kinetic energy of the particle will remain the same.
• hence, The kinetic energy of the particle will be the same after 5 seconds.

Therefore, The kinetic energy of the particle is 10 J after 5 seconds in a uniform magnetic field.

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