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The application of a contact diode is_________

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The application of a contact diode is_________

(a) Clampers and clippers

(b) Voltage multipliers

(c) Rectifiers

(d) AM detectors

I have been asked this question in an interview.

I would like to ask this question from The Point Contact Diode in portion Semiconductor-Diode Characteristics of Electronic Devices & Circuits

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The correct option is (d) AM detectors

To explain: The point contact diodes are the oldest microwave semiconductor devices. They were developed during  world war 2. They have excessive applications in microwave fields and used as receivers and detectors.

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