Q13 / 236 · NTA Abhyas (NEET) 2020 · Physics · Magnetic Effects of Current

A charged particle moves through a magnetic field perpendicular to its direction. Then

Correct answer
A
the momentum changes but the kinetic energy is constant
B
both momentum and kinetic energy of the particle are not constant
C
both, momentum and kinetic energy of the particle are constant
D
kinetic energy changes but the momentum is constant

Solution

The charged particle moves with constant speed on a circular path, i.e. it changes its direction continuously. Hence momentum changes, but as the speed is constant hence the kinetic energy will remain constant.

Hence, the correct answer is option: 'A'.

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