Question

What is a rectifier used for?

(a) Convert ac voltage to dc voltage

(b) Convert dc voltage to ac voltage

(c) Measure resistance

(d) Measure current

I have been asked this question in an internship interview.

Query is from Semiconductor Electronics in section Semiconductor Electronics : Materials, Devices and Simple Circuits of Physics – Class 12

Answer 1

The correct answer is (a) Convert ac voltage to dc voltage

The best explanation: A rectifier is based on the fact that a forward bias p-n junction conducts and a reverse bias p-n junction does not conduct electricity. The rectifier is used to convert alternating current voltage (ac) to direct current voltage (dc).