If the operating voltage of X-ray tube is $50 k V$ then velocity of X-ray

4 \times 10^{4} m / s e c

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3 \times 10^{8} m / s e c

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10^{8} m / s e c

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3 m / s e c

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Solution

The correct option is B $3 \times 10^{8} m / s e c$

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