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Q.

A sample of hydrogen is bombarded by electrons. Through what potential difference should the electrons be accelerated so that third line of Lyman series be emitted?

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a

2.55 V

b

10.2 V

c

12.09 V

d

12.75 V

answer is D.

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Detailed Solution

13.6 - 0.85 = 12.75 eV

So, 12.75 V is the required potential difference.

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