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Assume that a load Z absorbs power of 150 W at a lagging power factor of 0.8, and the voltage across the load Z is 220 Vms, 50 Hz. What must be the value of capacitor that needs to be connected in parallel with the load Z in order to raise the power factor to 0.95?
Since smart grid application is expected to have a substantial societal benefit in addition to the direct benefit to electric power customers and utility companies, how should the expected huge cost of smart grid infrastructure installation paid
Flip-flops must be in what mode (Set, Reset, Hold, or Toggle) in order to divide a clock's frequency when building a counter What is the advantage of a synchronous counter as compared to a ripple counter
A process has the dynamics G(s)=5/s^2. Design a unity negative feedback controller of the form G.c(s)=Ks+1 for a step response exhibiting approximately 15% overshoot.
Determine the phase relation between V o and i g for the given network if V g = 45sin(317t) and determine v o for the given network
The duration of a cellular call is an exponential random variable with expected value of 3 minutes. A subscriber makes 120 calls each month. Use the central limit theorem to estimate the probability that the subscriber uses at least 400 minutes.
What are the main differences between MS antennas and BS antennas. List the antennas used at mobile stations and describe the construction and characteristics of one of them in detail.
The mass spectrometer measurement section is a region of uniform magnetic field B= ˆxBms for z > 0. Ions enter the magnetic field (which exists for z > 0) at the origin with a known velocity +ˆz vz.
Electrons are liberated with zero velocity from the negative plate of a parallel plate capacitor, to which is applied a magnetic flux density B parallel to the plates. Prove that these electrons will not reach the positive plate.
The 24-bit data field of a packet is given by 0xBC603F. The packet contains a CRC with the generator polynomial given by X 3+X+1 a) Find the CRC checksum. Provide the complete code-word including the checksum in hex.
A 150kVA, 2080/208V, 60Hz, Y/Y connected, three-phase, step-down transformer consists of three identical single-phase transformers. Each transformer has the following parameter values: Rl = 0.45-ohm, Xl = 2.2-ohm , R2 = 4.5m-ohm
When making an impedance diagram, does inductive reactance go on the positive Y-axis, or the negative Y-axis. How about capacitive reactance. How do these graphical representations relate to the phase angels of the reactances.
a) It is required that the propagation delay be limited to 60 psec. Find the required device widths b) Find the High and Low noise margins, i.e. NMH and NML. c) What is the peak current drawn from VDD during switching of the inverter What is the aver..
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