Work function of oxide coated cathode is much lower than that of tungsten cathode.

More Questions from Electronic Devices and Circuits

• Assertion (A): A p-n junction has high resistance in reverse direction. Reason (R): When a reverse bias is applied to p-n junction, the width of depletion layer increases.
• The minority carrier life time and diffusion constant in a semiconductor material are respectively 100 microsecond and 100 cm2/sec. The diffusion length is
• As compared to an ordinary semiconductor diode, a Schottky diode
• In a p type material the Fermi level is 0.3 eV above valence band. The concentration of acceptor atoms is increased. The new position of Fermi level is likely to be
• The most commonly used semiconductor material is
• Which of the following is true as regards photo emission?
• If aac for transistor is 0.98 then βac is equal to

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