A beam of electrons is moving with constant velocity

Asked by admin @ 20/08/2021 in Physics viewed by 308 People

36. A beam of electrons is moving with constant

velocity in a region having electric and magnetic
fields of strength 20 Vm-1 and 0.5 T at right angles
to the direction of motion of the electrons. What is
the velocity of the electrons?
(1) 8 ms-1
(2) 5.5 ms-1
(3) 20 ms-1
(4) 40 ms-1

Answered by admin @ 20/08/2021

Answer:

(4)

Electric and magnetic fields would be equal

See page 182 , point no. 2

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