CBSE Class 12 · 2014 · SemiconductorsShort Answer

Explain, with the help of a circuit diagram, the working of a p-n junction diode as a half-wave rectifier.

Solution

Connect the ac source through a diode to a load resistance

R_{L}

.
During the half-cycle that forward biases the diode it conducts, and a current flows through

R_{L}

giving an output voltage.
During the next half-cycle the diode is reverse biased and does not conduct, so no output appears.
Thus output is obtained during alternate half-cycles only — a unidirectional (pulsating) dc.

Conducts one half-cycle only \Rightarrow half-wave rectified output.

CBSE Class 12 Board · 2014 · Subjective

Practise more: all CBSE board PYQs on Semiconductors →

More board questions on Semiconductors

A pure Si crystal having $5 \times 1 0^{28}$ atoms $m^{- 3}$ is doped with 1 ppm concentration of antimony. If the concentration of holes in the doped crystal is found to be $4.5 \times 1 0^{9} m^{- 3}$ , the concentration (in $m^{- 3}$ ) of intrinsic charge carr …
CBSE 2024View solution →
(a) Explain the characteristics of a p-n junction diode that makes it suitable for its use as a rectifier.
(b) With the help of a circuit diagram, explain the working of a full wave rectifier.
CBSE 2024View solution →
Explain the following, giving reasons.
(a) A doped semiconductor is electrically neutral.
(b) In a p-n junction under equilibrium, there is no net current.
(c) In a diode, the reverse current is practically independent of the applied voltage.
CBSE 2024View solution →
In an extrinsic semiconductor, the number density of holes is $4 \times 1 0^{20} m^{- 3}$ . If the number density of intrinsic carriers is $1.2 \times 1 0^{15} m^{- 3}$ , the number density of electrons in it is
CBSE 2023View solution →
Pieces of copper and of silicon are initially at room temperature. Both are heated to temperature T. The conductivity of
CBSE 2023View solution →
The formation of depletion region in a p-n junction diode is due to
CBSE 2023View solution →