Question

In a cathode ray tube, if the cathode plate is connected to the positive terminal of HT (voltage supply) instead of the negative terminal of HT will the thermionic emission occur?

Answer 1

In a cathode ray tube, if the cathode plate is connected to positive terminal of HT instead of the negative terminal HT, the termionic emission occurs. But the emitted electrons get repelled by the anode and only some electrons reach the screen.