how does modulation reduce bandwidth

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Am naseem sabah..i applied for PE in BEL.if anybody having sample questions for written test in BEL,pls forward to my mail id ....nsm.sbh@gmail.com..plsssssssssssss

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What is current commutation?

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What is the importance of valence shell and valence electrons?

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what do you understand by microwaves? why these are called micro

5 Answers   Bhel,

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why telecom tower having two color( Red and White)in all of the world, any solid reason

4 Answers   IEEE,

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why the cb amplifier ckt is considered to be most stable?

1 Answers   TATA,

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difference between USB net modem & GSM interface modem? Can we use usb modem in the place of GSM modem for wireless application? Also tell me Why we use AM for long distance communication but not FM(why do we use frequency reuse concept in FM radi only)

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What do mean by mnemonics in microprocessors? Give few examples.

9 Answers   NTPC,

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What is a sample and hold circuit? Where it is used?

0 Answers  

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1,what is the different between signal and variables in VHDL? 2,what is the different between function and procedure in VHDL?

1 Answers   Bosch,

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What is the speed of signal in optical fiber ??

3 Answers  

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