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Chapter 19: Problem 2656

The device associated with voltage controlled capacitance is (A) Light emitting diode (B) Photo diode (C) Varactor diode (D) Zener diode

Short Answer

Expert verified
The device associated with voltage-controlled capacitance is \( \boxed{ (C) \text{ Varactor Diode}} \).

Step by step solution

01

1. Light Emitting Diode (LED)

A Light Emitting Diode (LED) is a semiconductor diode that emits light when current flows through it. It is not associated with voltage-controlled capacitance.
02

2. Photo Diode

A Photo Diode is a semiconductor device that converts light into electrical current. When photons hit the diode, it generates electron-hole pairs and current flows through the device. It is not associated with voltage-controlled capacitance.
03

3. Varactor Diode

A Varactor Diode, also known as a Varicap Diode, is a semiconductor device with a variable capacitance that depends on the applied voltage. It is widely used in electronic circuits, such as frequency modulation and phase-locked loops, for tuning applications. As the device is associated with voltage-controlled capacitance, this is the correct answer.
04

4. Zener Diode

A Zener Diode is a semiconductor device designed to operate in reverse-bias breakdown, allowing current flow in the reverse direction under specific voltage conditions. It is commonly used for voltage regulation. It is not associated with voltage-controlled capacitance. Based on the analysis, the correct answer is: \( \boxed{ (C) \text{ Varactor Diode}} \)

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