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The Circular Motion

Find the cond...

Question

Find the condition under which the charged particles moving with different speeds in the presence of electric and magnetic filed vectors can be used to select charged particles of a particular speed.

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Solution

Condition for selecting particles for particular velocity is perpendicular magnetic field ad electric field when forces are equal and opposite.
$⟹ q v B sin \frac{π}{2} = q E$
$⟹ B v = E ⟹ V e l o c i t y V = \frac{E}{B}$

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