Question

An electron with kinetic energy $k$ enters a region of (i) uniform magnetic field (ii) nonuniform magnetic field and comes out with kinetic energy $k_{1}$ and $k_{2}$ respectively. What is the relation between $k_{1}, k_{2}$ and $k$ ?

• A. $k _{1}> k _{2}> k$
• B. $k _{1}= k _{2}> k$
• C. $k _{1}= k _{2}= k$
• D. $k _{1}< k _{2}< k$

Answer 1

Answer: (C)

Any type of magnetic field cannot change kinetic energy of charged particle. So
k₁ = k₁ = k