Q. 5

The anode of a thermionic diode is connected to the negative terminal of a battery and the cathode to its positive terminal.
A. No appreciable current will pass through the diode.

B. A large current will pass through the diode from the anode to the cathode.

C. A large current will pass through the diode from the cathode to the anode.

D. The diode will be damaged.

Answer :

When cathode is connected to positive terminal and anode to negative terminal electrons will not able to leave the surface of cathode and hence no thermionic emission will be accounted. This will result in no current passing through diode.

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