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1. A piezoelectric crystal has an effective mas of 5X10-2 kg, stiffness of 2)(1010 N/m and a damping constant 200 Ns/m. The electrical capacitance of the crystal is 1600pF and the charge sensitivity is 2X10-10 C/N.
i) Calculate the series and parallel resonant frequencies of the crystal.
ii) The magnitude and phase of the overall electrical impedance of the crystal at the above frequencies.
2. With an aid of a block diagram, derive the equation of the frequency shift and the adder output signal equation for an ultrasonic Doppler flow meter.
Write the VHDL PROCESS statements for a D flip-flop with asynchronous active-LOW clear, synchronous active-LOW preset, and responsive to a falling edge clock. Use D for the input, Q and for the output, PRE for the preset, CLR for the clear, and CL..
Describe how an ideal inductor reacts to steady state DC and why. State the equation for finding the instanteneous current in an inductor during the transient period. Explain each part
A uniform flux density of 1 T is perpendicular to the plane of a five-turn circular coil of radius 10 cm. Find the flux linking the coil and the flux linkages. Suppose that the field is decreased to zero at a uniform rate in 1ms. Find the magnitud..
A 200 resistor, a 10 mH inductor and a 4.7 µF capacitor are connected in a series circuit. a. Is the circuit overdamped, underdamped, or critically damped b. Write the characteristic equation and find the poles of this circuit.
One system has a cpu a tdp of 125w and one has a 67w tdp. 125W System has 10 times bigger copper heatsink and blows 3 times more volume of air than the system of 67w. The 125w system reads 55C max CPU core temperature.
Create a table of results and plot the angle vs tension in cable B. Assume that the cables are attached to the weights rather than a passing through loops attached to the weights
A 74.6-kW, three phase, 440-V (line to line), four pole, 60-Hz induction motor has the following (per phase) parameters referred to the stator circuit: Rs=0.06-Ω, Rr=0.08-Ω, Xs=0.3-Ω, Xr=0.3-Ω, Xm=5-Ω The no-load power input is 3240-W at a current ..
The line current is 51 A and the shunt-field resistance is 120 ohm. If the armature resistance is 0.1 ohm, calculate the speed if the shunt-field resistance is doubled at no load condition. Suppose the terminal voltage VT does not change.
Two batteries with voltages in opened circuit V1 and V2 and with internal resistencies R1 and R2, respectively are connected in parallel with themselves and with a load resistance R. a) Find the current that goes through the load resistance.
The Fourier transforms of odd and even functions are very important. The reason is that they are computationally simpler than the Fourier transform. Let x(t) = e-ItI and y(t) = e-tu(t) - etu(-t). a. Plot x(t) and y(t), and determine whether they ar..
Find the density for germanium (Ge) semiconductor atoms give that its lattice constant a-5.66Å (Angstrom) and atomic weight is 72.59 g/mole.
Design an XOR gate using standard CMOS logic and with pass-transisitor logic and determine the number of transistors (NMOS and PMOS) required for each implementation.
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