Question

In reverse bias, rectifier behaves as a___________

(a) Resistor

(b) Capacitor

(c) Inductor

(d) Amplifier

The question was asked during a job interview.

This is a very interesting question from The Rectifier Voltmeter topic in section Application of Diodes of Electronic Devices & Circuits

Answer 1

The correct choice is (b) Capacitor

The explanation is: The rectifier exhibits capacitance properties when reverse biased, and tends to bypass higher frequencies. The meter reading may be in error by as much as 0.5% decrease for every 1 kHz rise in frequency.