Junction Diode as a Rectifier: The process of conversion of an ac voltage into a dc…
Physics · Class 12 · CBSE — Semiconductor Electronics
Junction Diode as a Rectifier:
The process of conversion of an ac voltage into a dc voltage is called rectification and the device which performs this conversion is called a rectifier. The characteristics of a p-n junction diode reveal that when a p-n junction diode is forward biased, it offers a low resistance and when it is reverse biased, it offers a high resistance. Hence, a p-n junction diode conducts only when it is forward biased. This property of a p-n junction diode makes it suitable for its use as a rectifier.
Thus, when an ac voltage is applied across a p-n junction, it conducts only during those alternate half cycles for which it is forward biased. A rectifier which rectifies only half cycle of an ac voltage is called a half-wave rectifier and one that rectifies both the half cycles is known as a full-wave rectifier.
In a full-wave rectifier:
- Both diodes are forward biased at the same time.
- Both diodes are reverse biased at the same time.
- One is forward biased and the other is reverse biased at the same time.
- Both are forward biased in the first half of the cycle and reverse biased in the second half of the cycle.
Answer
(C) One is forward biased and the other is reverse biased at the same time.
Sign up free on Edukali to view the step-by-step worked solution and practice thousands of similar questions.
Related practice questions
- Which of the energy band diagrams shown below corresponds to that of a semiconductor ?
- In the given Fig., V o is the potential barrier across a p-n junction, when no battery is connected across…
- An n-type semiconducting Si is obtained by doping intrinsic Si with:
- In the circuit shown if drift current for the diode is 20 μA, the potential difference across the diode is
- A p-n photodiode is fabricated from a semiconductor with a band gap of 2.5 eV. The signal wavelength is
- Three photo diodes D 1 , D 2 and D 3 are made of semiconductors having band gap of 2.5 eV, 2 eV and 3 eV…
- In the energy-band diagram of n-type Si, the gap between the bottom of the conduction band E C and the donor…
- In a half wave rectifier circuit operating from 50 Hz mains frequency, the fundamental frequency in the…
More Semiconductor Electronics questions · Browse all practice questions