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The operating frequencies of the point contact diode is_________

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The operating frequencies of the point contact diode is_________

(a) 30KHz or above

(b) 10GHz or above

(c) 30GHz or above

(d) 10KHz or above

I had been asked this question by my school teacher while I was bunking the class.

I'm obligated to ask this question of The Point Contact Diode topic in chapter Semiconductor-Diode Characteristics of Electronic Devices & Circuits

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Right option is (b) 10GHz or above

To elaborate: It’s used in high frequency conversions and circuits in the order of 10KHz or above. The reactance due to capacitance is high and at high frequency a very small capacitive current flows.

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