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Wednesday, 01 April 2026
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If the frequency of an emitted x-ray is 1.6 x 10\(^{16}\)Hz, the accelerating potential ...

If the frequency of an emitted x-ray is 1.6 x 10\(^{16}\)Hz, the accelerating potential is?

[e = 1.6 x 10\(^{-19}\)J, h = 6.63 x 10-\(^{34}\)Js]
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  • A 6630.0V
  • B 663.0V
  • C 66.3V
  • D 6.6V
Correct Answer: Option C
Explanation:
Given f = 1.6 x10\(^{16}\)H\(_{3}\), h = 6.63 x 10\(^{-39}\)Js
e = 1.6 x 10\(^{-19}\)C, V = ?
V = \(\frac{w}{e} = \frac{hf}{e}\) = \(\frac{1.6 \times 10^{16} \times 6.63 \times 10^{34}}{1.6 \times 10^{-19}}\)
= 66.3V

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