An \( \alpha \)-particle is accelerated by a potential difference of \( 10^{4} \mathrm{~V} \). F...

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An \( \alpha \)-particle is accelerated by a potential difference of \( 10^{4} \mathrm{~V} \). Find the change in its direction of motion, if it enters normally in a region of thickness \( 0.1 \mathrm{~m} \) having transverse magnetic induction of \( 0.1 \) Tesla. (Given : mass of \( \alpha \)-particle \( \left.6.4 \times 10^{-7} \mathrm{~kg}\right) \)
Ans. \( \left[\theta=30^{\circ}\right] \)
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