Electronics and Communication Engineering Questions and Answers
Prepare for your Electronics and Communication Engineering exams/aptitude tests, assess your knowledge of electronics and communication equipment with these ECE questions and answers.
Prepare for your Electronics and Communication Engineering exams/aptitude tests, assess your knowledge of electronics and communication equipment with these ECE questions and answers.
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
True
False
Cannot say
It depends
Correct answer is B
Work function is the minimum energy required by the fastest electron at 0 K to escape from the metal surface.
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.