An electron is accelerated from rest through a potential difference \( V \). This electron exper...
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0An electron is accelerated from rest through a potential difference \( V \). This electron experiences a force \( F \) in a uniform magnetic field. On increasing the potential difference to \( V \), the force experienced by the electron in the same magnetic field becomes \( 2 F \). Then the ratio \( \left(V^{\prime} / V\right) \) is equal to
(A) \( \frac{4}{1} \)
(B) \( \frac{2}{1} \)
(C) \( \frac{1}{2} \)
(D) \( \frac{1}{4} \)
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