List three advantages of p - n… | Physics

Question 1 Report

List three advantages of p - n junetion diode over diode valve.

Answer

Answer Details

Three advantages of a p-n junction (semiconductor) diode over a diode valve (vacuum-tube diode)

Much smaller and lighter: a semiconductor diode is very compact, so circuits built with it can be made small and portable.
No heater/filament needed: it works cold and requires no warming-up time, whereas a diode valve needs a heated cathode; the semiconductor diode therefore consumes far less power.
More rugged, cheaper and longer-lasting: it has no fragile glass envelope or filament to break or burn out, so it is mechanically robust, inexpensive and durable.

(Other acceptable points: it operates at lower voltages and switches on instantly.)

List three advantages of p - n junetion diode over diode valve.