From an architectural point of view, what network components should be added to a GSM system and which new connections should be made between the various network components so that it has a GPRS support?

A 4 pole10V, DC shunt motor operates on a load current 10A, having wave connected armature with 200 conductors. The flux per Pole is 25 m Wb. Resistance of shunt field winding is 1 ohm and resistance of the armature is 0.15 ohm. a) what would be the back emf?

In the context of a virtual circuit network, what does "connection status information" mean? If a switch in a VC network creates and removes connections at a rate of one per millisecond (on average), at what rate does the switch's forwarding database need to be updated?

1) Describe, with the aid of sketches, the mechanisms built into the design of an HRC fuse link to enable it to respond efficiently to a sustained overload as well as to a severe short-circuit condition 2) Explain the significance of ‘let-through energy’ when assessing discrimination between major and minor fuses in a system of feeder protection. Describe how manufacturers’ data can be used in this assessment.  3) Attached figure shows a time-current characteristic typical of miniature circuit breakers. Explain how such a characteristic can be achieved in the construction of an MCB. In what respect would the actual characteristic of Type D MCB differ from that of Type B of the same rating? What significance does this difference have on the application of each type? 4) In general, HRC fuses provide back-up protection for the overload protection relay incorporated in an induction motor starter. Define the two types or levels of back-up protection that could be provided and explain the…

Mathematically describe the differences between DSB-AM, USB-AM, and QAM demodulators at the receiver/demodulator side; then, interpret those differences of mathematical descriptions in detail based on the physical concept level understanding. If we have DSB-AM modulator and demodulator, launching the USB-AM scheme demands the change of demodula- tion structure at the receiver? What about the case of launching the QAM scheme; it requires change of demodulator structure at the receiver? If the USB-AM and/or QAM requires changes, mathematically describe the changes. If a user's receiver has only the demodulator for DSB-AM, explain how the transmitter with the QAM modulator can support that user. Describe as much as you can for the full credit.

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Q3. In a three-phase full-bridge inverter circuit, the de voltageV = 250V, the amplitude modulation indexma = 0.8, the frequency modulation index m, = 21, and the frequency of the three-phase sine modulating wave is 50 Hz. The load is a three-phase Y-connected RL load with R-592 and L=40mh. Calculate (a) the switching frequency, (b) the rms value of the output voltage and phase current at the fundamental frequency (c) the rms value of the dominant harmonics (consider only four components). [fr] s If the amplitude of the sin modulating wave is increased to 3.5 times the carrier frequency amplitude and load is changed to resistive load with R=52, (d) draw the line to neutral voltage (e) draw the line to line voltage (e) express the line to line voltage Vab by the Fourier series (consider the four dominant harmonic order only) (f) determine the active power consumed on three-phase load. chort-cirassis 1800

Please can you tell me which items is the correct one from below 1. E-MOSFET 2. CMOS 3. VMOSFET 4. JFET

What are the uplink and downlink bands for GSM 900?

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