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Which statement is true about varacter?

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Which statement is true about varacter?

(a) it is a diode

(b) it is a voltage-controlled oscillator

(c) it is used in tuned circuits

(d) it is a diode used in tuned circuit and also has a voltage-controlled capacitor

The question was asked during an interview.

The origin of the question is Baseband Channel in chapter Baseband Data Transmission of Analog Communications

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The correct option is (d) it is a diode used in tuned circuit and also has a voltage-controlled capacitor

Explanation: Varacter is a diode used in communication for tuning the circuit. It is also known as voltage controlled capacitor (VCC).

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