An electron moving towards the east enters a magnetic field directed towards the north. The force on the electron will be directed

Options

A. `(2e^(2))/( 4 pe_(0)r^(2)SW`
B. `(e^(2))/(4p ie_(0)r^(2)) NE`
C. `(2e^(2))/(4 p e_(0)r^(2)) Ne`
D. `(e^(2))/(4 pi e_(0)r^(2)) SW`

Answer

A

Explanation

The charge on alpha particle is 2e. The electron is attracted and electric forces are central forces and act along the line joining the charged particles.