Question

a steam of electrons traveling with speed v m/s at right angles to a uniform electric field E is deflected in a circular path of radius r prove that e/m=V2/rE​

Answer 1

Answer:

An electron of mass m and charge q is travelling with a speed v along a circular path of radius r at right angles to a uniform of magnetic field ...

Answer 2

Answer

Given,

Mass of electron=m

Charge of electron=q

Velocity of electron=V

Radius of electron = r

Magnetic field =B

We know that force due to magnetic field, FB=qvB

Now if V′=2V and B′=2B

Then FB′=qV′B′=q(2V)(2B)

FB=rmV2

⟹r=qVBmV2⟹r=qBmV and

r′=q(2B)m(2V)

r′=4r