Frequency at which VOICE is sampled is? a) 4 KHz b) 8 KHz c) 16 KHz d) 64 KHz

6 Answers   BSNL,

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What is Pabx and epabx and what its use?

6 Answers   Reliance,

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What is meant a parallel inverter?

0 Answers  

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Why half-wave rectifiers are generally not used in dc power supply?

0 Answers  

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why we use the fuse

5 Answers   DRDO,

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Which type of connector we use at the end of GSM antenna/

0 Answers   NSN,

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box1-a box2--a box3-a-1 in 3steps using any operation get a*(a-1)-(a-1)*a in box2

0 Answers   Godrej,

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Define angle and amplitude modulation? What is noise in modulation?

0 Answers  

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What is D-FF? What is the basic difference between Latches and Flip flops? What is a multiplexer? How can you convert an SR Flip-flop to a JK Flip-flop? How can you convert an JK Flip-flop to a D Flip-flop? What is Race-around problem? How can you rectify it? Which semiconductor device is used as a voltage regulator and why? Explain an ideal voltage source? Explain zener breakdown and avalanche breakdown? What are the different types of filters? What is the need of filtering ideal response of filters and actual response of filters? What is sampling theorem? What is impulse response? Explain the advantages and disadvantages of FIR filters compared to IIR counterparts. What is CMRR? Explain half-duplex and full-duplex communication? Which range of signals is used for terrestrial transmission? Why is there need for modulation? Which type of modulation is used in TV transmission? Why we use vestigial side band (VSB-C3F) transmission for picture? When transmitting digital signals is it necessary to transmit some harmonics in addition to fundamental frequency? For asynchronous transmission, is it necessary to supply some synchronizing pulses additionally or to supply or to supply start and stop bit? BPFSK is more efficient than BFSK in presence of noise. Why? What is meant by pre-emphasis and de-emphasis? Explain 3 dB cutoff frequency? Why is it 3 dB, not 1 dB? Explain ASCII, EBCDIC?

3 Answers   DRDO, Electronics,

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i need supervisor exam model qustion paper

4 Answers   Bhel, MOIL,

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Wy the VLF are used for some types of services?

1 Answers  

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We all know about DC concept,i.e +ve connected to +ve ,-ve connected to -ve. If landline phones lines are dc lines,then how it works even if the polarties are interchanged??

1 Answers   Infosys,

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