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                                    The potential difference in an X -ray tube is 5 kV and the current through it is 3.2 mA. Then the number of the electrons striking the target per second is | 
                            
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Answer»  The potential difference in an X -ray tube is 5 kV and the current through it is 3.2 mA. Then the number of the electrons striking the target per second is  | 
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