The potential difference applied to an 
-ray tube is 5 kV and the current through it is 3.2 mA. Then the number of electrons striking the target per second is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
Given, potential difference, 
and discharge current, 
As, We know that current, 
where, 
number of electron, 
charge on electron and 
time
Putting 
and 
Hence, 
electrons are striking the target per second.
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