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The solution to Power Factor, Two single-phase loads are connected in parallel across a 415 V, 50 Hz supply. One load is rated 130 kW at a power factor of 0.75 and the other is 74 kW at a power factor of 0.6. Determine the capacitor value required to be placed in parallel with the combined load if the overall power factor is to be improved to 0.85.
This solution shows how to work from a given circuit implementation (a J-K flip flop circuit design) to derive the Boolean Logic and in so doing so simplify such logic using Boolean Algebra rules
Explain briefly from what you notice about the digital output values in (a) why a digital output value of an A/D converter is rarely the exact same digital value as the analogue input value.
Important information about Examination of a digital radio link A. A digital radio link operates at a frequency of 75 MHz and uses ideal RRC filters with nroll off factor r = 0.2 in the transmitter
What effect do internal capacitances in the transistor model have on practical performance of a real system? How would you use these model values to predict system performance?
What is the peak frequency deviation of the FM signal? What is the FM improvement in dB?
What are the essential features of an ideal op amp? Identify the terminals of an op amp. Draw its equivalent circuit. Define virtual ground and what is difference amplifier? Draw its circuit. Define C.M.R.R.
State Carson's rule for bandwidth estimation. What does it reduce to for NBFM and WBFM and d erive an time domain expressionfor the output xd(t) of the system
Digital Communications, Order the following modulation types in terms of spectral efficiency (best to worse) and explain
Calculate in polar form the sequence components of unbalanced lineto-neutral voltages and calculate in polar form the phase currents corresponding to the sequence components
How are the left (L) and right (R) signals obtained separately in the radio receiver to drive the dual channel audio amplifier and speakers?
If we have a 600ohm transmission line terminated with a 1200ohm resistor, how long must the transmission line be if the input impedance is purely real?
A telephone switching board can handle 120 phones. Assuming the following, and determine the outgoing traffic intensity and the number of channels
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