A particle of mass m, charge Q and kinetic energy T enters a transverse uniform magnetic field vecB. After 3 seconds the kinetic energy of the particle will be

Question

A particle of mass m, charge Q and kinetic energy T enters a transverse uniform magnetic field vecB. After 3 seconds the kinetic energy of the particle will be (A) T (B) 4T (C) 3T (D) 2T

Tardigrade Admin · Accepted Answer

When a charged particle having a given K.E, T enters in a field of magnetic induction, which is perpendicular to its velocity, it takes a circular trajectory. It does not increase in energy, therefore T is the K.E.

Q. A particle of mass $m$ , charge $Q$ and kinetic energy $T$ enters a transverse uniform magnetic field $B$ . After $3$ seconds the kinetic energy of the particle will be

$T$

$4 T$

$3 T$

$2 T$

When a charged particle having a given K.E, $T$ enters in a field of magnetic induction, which is perpendicular to its velocity, it takes a circular trajectory. It does not increase in energy, therefore $T$ is the K.E.

Q. A particle of mass m, charge Q and kinetic energy T enters a transverse uniform magnetic field B. After 3 seconds the kinetic energy of the particle will be

T

4T

3T

2T