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Electronics and Communication Engineering - Electronic Devices and Circuits - Discussion

Discussion Forum : Electronic Devices and Circuits - Section 13 (Q.No. 27)
Electronic Devices and Circuits
27.
In commercial electron tubes the current produced by the cathode at 1000 K is about
0.01 A per cm2 of cathode surface
0.1 A per cm2 of cathode surface
1 A per cm2 of cathode surface
5 A per cm2 of cathode surface
Answer: Option
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