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Hello everyone here we are given the case of an electron and cathode ray beam passes 2 .5 centimeter long parallel plate that are 4 .2 millimeter distance apart.
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There's a magnetic field of 1 .8 millitessla.
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We have to find the electrons speed if the potential difference is 600 volts and then we have to find the electrons radius of light.
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Curvature if v, that is potential, is said to be 0 both.
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Now let us start with part a.
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We know that electric field e is equal to potential difference divided by the distance between the plates.
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Velocity v is equal to electric field divided by the magnetic field.
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Hence, the velocity is equal to, in place of electric field, we can put potential difference divided by the distance.
01:07
This whole is divided by the magnetic field.
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So we have v divided by d, d...