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An X-ray tube operates on 30 kV. The minimum wavelength emitted is h = 6.6 x 10^-34 Js,

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An X-ray tube operates on 30 kV. The minimum wavelength emitted is h = 6.6 x 10-34 Js, c = 3 x 108 m/s, e = 1.6 x 10-19 C.

(a) 6.6 Å 

(b) 0.133 Å 

(c) 1.2 Å 

(d) 0.4 Å

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Correct answer is (d) 0.4 Å

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