Which of the following are true?
(i) A rectifier converts AC to DC.
(ii) Collector and emitter of a transistor can be interchanged
(iii) Zener diode is always reverse biased
(iv) N Majority carries of N-type semi-conductor are electrons
(i) & (iii)
(ii) & (iii)
(iii) & (iv)
(i) & (iv)
Zener diode is always reverse biased so option 3 is also possible. Am I right?