Why is 400 hz used for flight instruments and radio transmission system in aviation industry universally?

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what is ISDN?

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If we have 450 mm height boiler drum level, so what is span & zero value for a dpt transmitter?

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what is the main application of scr in electronic field as well as in software field?

3 Answers  

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The function of a transistor used in any of the ics is to perform switching action and not amplification. Then why diodes are not used instead of transistors as diodes also exhibit the same switching action?

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What is transister

8 Answers   HCL, intex,

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What is meant by pmdc?

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i am electronics & comm engg & appling 4 the AAI jr executive (electronics/ATC) written test. pls forward me the syllabus & old question papers.I will be very much thankful to you akil403@yahoo.com

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wt is conventional direction of current in a ckt?y it is taken as?

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What are the various logic gates?

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Explain what is an inverting amplifier?

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Give examples of linear circuits.

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