An electron is moving with kinetic energy of value 150 eV inside a magnetic field of value 3 T. The angle between the electron's velocity and the field is 40°. \left[\mathrm{m}_{\mathrm{e}}=9.110^{-31} \mathrm{~kg}, \mathrm{q}_{\mathrm{e}}=-1.610^{-19} \mathrm{C}, 1 \mathrm{eV}=1.6 \times 10^{-19} \mathrm{~J}\right] Find the velocity of the electron? II.What is the magnetic force on acting on the electron? 3. Find the force direction if the velocity and magnetic fielddirections as shown? If you can change the angle, what is the angle when themagnetic force is maximum and what is its value when themagnetic force is minimum?

Fig: 1

Fig: 2

Fig: 3

Fig: 4

Fig: 5

Fig: 6

Fig: 7