Question

an electron with charge -e and mass m travels at a speed v in a plane perpendicular to a magnetic field of magnitude b the electron follows a circular path of radius R in a time t the electron travels halfway around the circle what is the amount of work done by the magnetic field​

Answer 1

Answer:

The magnetic force

is

to

as well as

, since

is

to

, charged particle will below circular path inside

is circular arc, sketch two tangent lines at

and

, if we make perpendicular lines on tangent lines passing through

and

, these perpendiculars will meet at centre

of circle. <br> Here,

: angle of deviation. <br> In

<br>

<br>

<br> Time-period

<br> Time to travel circular arc of angle

<br>

: in radian <br> Deflection

to initial motion dierction: <br>

<br>

<br> If

is small,

<br>

<br>

<br>

<br> This formula is valid if

<br> If