PYQ · APPSC Group I 2017 · Screening Test · Q74 Difficulty 2/5
ICT and Emerging Digital Technologies› Electronics, Sensors and Smart Devices
A diode is used for
Answer c.
Explanation Answer · c
The answer is (c). A diode lets current flow in only one direction, so it is used as a rectifier to convert AC into DC. A semiconductor diode is a p-n junction. It conducts when forward biased and almost blocks current when reverse biased. With alternating current (AC), which keeps changing direction, the diode passes only one half of each cycle. This one-way output is direct current (DC), and the process is called rectification. Two or four diodes (full-wave and bridge rectifiers) use both halves of the cycle.
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