Question

ASK YOUR TEACHER PRACTICE ANOTHER decen entering Thomson's/mppaus (weeres below an initial velocity in horontal direction only) of X 10'sing around the permanent horseshoe magnet of the L1 X 102, which you would be toute a) What electric field will you need in order to producere defection of the electrons as they travel to the us? When the magnetic field is tuned off, but the same de demain, how are a detection will the region of more and also long

Answer 1

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(a)

electric force and magnetic forces are equal

qE = qvB

E = vB

E = 0.9e7 * 1.1e-2

E = 99000 V/m

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(b)

Fnet = ma

qE = ma

a = qE / m

so,

d = 1/2 * qE / m * (L / v)²

d = 1/2 * 1.6e-19 * 99000 / 9.1e-31 * (0.02 / 0.9e7)²

d = 1/2 * 1.7406e16 * 4.93827e-18

d = 0.043 m

or

d = 4.3 cm