- Home
- Standard 12
- Physics
11.Dual Nature of Radiation and matter
easy
When electron beam passes through an electric field, they gain kinetic energy. If the same beam passes through magnetic field, then
A
Their energy increases
B
Their momentum increases
C
Their potential energy increases
D
Energy and momentum both remains unchanged
Solution
(d) Because magnetic force always points perpendicular to the particle velocity. That is why velocity remains unchanged thereby keeping energy $\left( {\frac{1}{2}m{v^2}} \right)$ and momentum $(mv)$ unchanged.
Standard 12
Physics
