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Direction : The questions 60 and 61 are based on following paragraph : An X-ray tube operated at a D.C, voltage of 40 kV produces heat at the target at the rate of 720 W. If 0.5% of the energy of the incident electron is converted into X-ray radiation, then (sp. charge is 1.8xx10^(11)C//kg). The velocity of the incident electron is |
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Answer» `1.2xx10^(8)m//s` `:.v=SQRT(2V((e)/(m)))= sqrt(2xx40,000xx1.8xx10^(11))` `=1.2xx10^(8)m//sec` |
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