Question

An electron after being accelerated through a potential difference of 100 v enters a uniform magnetic field of 0.004 t perpendicular to its direction of motion. calculate the radius of the electron

Answer 1

Keeping in view that, an electron after being accelerated through a potential difference of 100 v enters a uniform magnetic field of 0.004 t perpendicular to its direction of motion. The radius of the electron would be; 8.43×10⁻³m.

Explanation:

r= 1/B√2mV/e.

r=8.43×10⁻³m.

Answer 2

we use the formula of kinetic energy for this..
kinetic energy gained when an electron is accelerated through a potential difference V

(mv^2)/2 = eV

v = √(2eV/m)

now we put v in r = mv/(qB)
and out values..

I consider You calculate the value now