Back in the day, a standard television tube would work by accelerating electrons through an electrostatic potential and then bending them with a magnetic field as shown in the figure at the right. If the electrostatic potential difference used to accelerate the electrons through the anodes is 11,000 Volts, estimate the maximum strength of a magnetic field needed to control the deflection of an electron beam. You will have to estimate reasonable parameters for the required distances.

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anonymous · Answer

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anonymous · Answer

@IrishBoy123 @Michele_Laino @matt101

anonymous · Answer

@ganeshie8 @BAdhi

anonymous · Answer

I know that we could possibly use the equation for emf
$$emf=\frac{ FL }{ q }$$ since we're given voltage? but I honestly don't know how to begin this problem

badhi · Answer

Im not 100% sure about this but I think I can give a bit of pointers

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you can find the v (velocity when the particle move out from the anode from then onwards it will have a constant velocity)

so for the time $t_1$ which it will travel the $x$ distance under the force of magnetic field it should get the deflection that it supposed to get (so the maximum deflection $d_{max}$ also has to be gained on this time period)

so you can find the value $c$ from $x, y, d_{max}$ and with use of kinematic equations, you can find the acceleration it requires to gain that difflection - $c$  from time $t_1$

with that acceleration you can find the strength of the magnetic field (hopefully ;) )

I have to say Im not entirely sure about this but hope you'd find something out of this :)