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_________ diodes are preferred in AC rectifier voltmeter arrangements.

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_________ diodes are preferred in AC rectifier voltmeter arrangements.

(a) Silicon

(b) Germanium

(c) Gallium

(d) Arsenide

This question was addressed to me in final exam.

The doubt is from The Rectifier Voltmeter in portion Application of Diodes of Electronic Devices & Circuits

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The correct answer is (a) Silicon

The best I can explain: Silicon diodes are preferred because of their low reverse current and high forward current ratings. A PMMC movement is also used by the rectifier type instruments along with a rectifier arrangement.

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