Why opamp called operational amplifier?

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How to find resistivity?

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I have recieved an interview call from HECL that is Heavy Engineering Corporation Ltd, Ranchi , Jharkhand. Can you please provide me some Electronics and Communication questions for preparation as early as possible since I am left with just one week.

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Tell me is there any junction in conductor?

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what is the present model of group1 and group 2 syllabus plz send the link ?

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needed web address and its directory for objective type question with answer in electronics instrumentation paper.

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RF amplifier of an A.M. receiver is normally biased in a.) Class 'A' b.) Class 'b' c.) Class 'C' d.) None

5 Answers   BSNL,

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Explain why does sidebands vl come in case of analog modulation?

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I am a B Tech student n am very much interested in science n math.in which site i can find more concept regarding ECE?

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i am going to face the gd round for the ues exam ,going to be conducted in our college campus by indian army soon so i just want to know that which kind of technical questions are usually asked in the interview after gd ..???

1 Answers   Indian Military Services,

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Define why series inductor and l-section filters cannot be used with half-wave rectifiers?

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differentiate wired and wireless communication. differentiate co-channel and adjacent channel interference.

4 Answers   Bell,

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