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24 Jun 2009 07:33:45 IST
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The binding energy of the innermost electron in tungsten is 40 keV. To produce characteristic X-rays using a tungsten target in X-ray tube, the potential difference V between the cathode and anticathode should be: - [A]. V < 40 kV [B]. V<=40 kV [C]. V > 40 kV [D]. V >= 40 kV
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1 Jul 2009 22:23:50 IST
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D.. V>=40 kV ..... if V is less than 40 eV, t wont b able to knock off the electron from the atom's influence completely...
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