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

Physics
JAMB 2021

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]

  • A. 6630.0V
  • B. 663.0V
  • C. 66.3V
  • D. 6.6V
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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

There is an explanation video available below.


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Explanation Video

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JAMB 2025 UTME Revisions Have Begun
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