An electron accelerated from rest through a voltage of 550 V enters a region of

ID: 1431936 • Letter: A

Question

An electron accelerated from rest through a voltage of 550 V enters a region of constant magnetic field.

Part A

If the electron follows a circular path with a radius of 17 cm , what is the magnitude of the magnetic field?

Express your answer using two significant figures.

An electron accelerated from rest through a voltage of 550 V enters a region of constant magnetic field.

Part A

If the electron follows a circular path with a radius of 17 cm , what is the magnitude of the magnetic field?

Express your answer using two significant figures.

B = T

KE = eV

=> 1/2*mv^2 = eV

=> v = (2*1.6*10^-19*550)/(9.1*10^-31)

v = 13907069.90 m/s

R = mv/qB = (9.1*10^-31*13907069.90)/(1.6*10^-19*B)

=> B = (9.1*10^-31*13907069.90)/(1.6*10^-19*0.17) = 0.00046527 T

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