1.

A cathode emits \[1.8\times {{10}^{14}}\] electrons per second, when heated. When 400V is applied to anode all the emitted electrons reach the anode. The charge on electron is \[1.6\times {{10}^{-19}}C\]. The maximum anode current is    [MP PMT 2004]

A.   \[2.7\mu A\]      
B.   \[29\mu A\]
C.   \[72\mu A\]       
D.   29 mA
Answer» C.   \[72\mu A\]       


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