If an electron moves in a circle of radius 21 cm perpendicular to a B field of 0.4 T, what are the speed of the electron and the frequency of motion?

a)

m/s

b)  

Angular frequency =  

Explanation:

As we know

q is the charge on the electron = C

B is the magnetic field in Tesla = T

r is the radius of the circle = m

mass of the electrons = Kg

a)

Substituting the given values in above equation, we get -

m/s

b)  

Angular frequency =

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