In which of these is reverse recovery time nearly zero?
Zener diode
Tunnel diode
Schottky diode
PIN diode
Correct answer is C
In schottky diode there is no charge storage and hence almost zero reverse recovery time.
The most commonly used semiconductor material is
silicon
germanium
mixture of silicon and germanium
none of the above
Correct answer is A
Germanium is rarely used
At room temperature, the current in an intrinsic semiconductor is due to
holes
electrons
ions
holes and electrons
Correct answer is D
Intrinsic material has equal number of holes and electrons.