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Data Communication
1. Write short notes on:
a. Sky wave propagationb. Line of sight propagation
2. List and describe the different types of errors that occur during data transmission.
3. What is the concept of multiplexing. Explain about Frequency-division multiplexing.
4. Illustrate Code-Division Multiple Access (CDMA).
5. Define topology? Explain the types of LAN topologies.
6. Briefly write short notes on IEEE 802.1Q VLAN standard.
Q. Sketch the timing diagram for a 4-bit ripple counter which uses T flip-flops.
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The field resistance of a dc machine is 50 ohm at 20 o C. The resistance increases to 55 ohm at 50 o C. Find the temperature coefficient of the resistance material. Ans: Sol
Cross Section of NMOS with Channel Formed: ON state A metal-oxide-semiconductor field-effect transistor (MOSFET) is based upon the modulation of charge concentration through a
Suppose that a video signal, having W = 5 MHz, is transmitted via FM with f = 20 MHz. For 1/100 ≤ B/fc ≤ 1/10, determine the bounds on the carrier frequency. Use WFM ∼ = 2( ω + 2W
Q For a parallel-plate capacitor with plates of area A m 2 and separation d m in air, the capacitance in farads may be computed from the approximate relation Compute the a
For sign flag RP ( Return on Plus ) and RM ( Return on no minus ) Instructions RM returns from the subroutine to the calling program if sign flag is set (S=1). The in
Construction and working of calomel electrode
how the clipper circuits are working? explanation of working of clipper circuits
Materials with 'hard' magnetic B/H characteristics often show a strong residual magnetism. This makes them suitable for making permanent magnets. If the ring material were magnetis
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