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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.
Find the electric flux density field everywhere in space produced by two concentric spherical shells of surface charge density +ro and -ro of radius ‘a' and ‘b', respectively, where a
The energy stored in a 2H inductor is 400J and is decreasing at 200J/s at t=4 seconds. Determine the voltage magnitude and curent magnitude at t=4 seconds. Does the current enter or leave the positive terminal of the inductor.
The switch in the circuit has been in position a for a long time. At t=0 the switch is moved to position b. A.Calculate the initial voltage on the capacitor if v = 200V , and i = 1.9mA.
Define voltage regulation of a transformer.Define all day efficiency of a transformer. Why transformers are rated in kVA?
Consider a p-type Si sample with a resistivity of 0.5 · cm. The doping level is uniform throughout. In a certain portion of this sample, there is an electric field of a magnitude 1000 V/cm. Estimate the magnitude of a) the electron drift velocit..
what is the linear dynamic range of the amplifier?
The problem has two parts(a and b) and it asks: Find the power and rms value of each of the following signals: a) x(t) = 5 + Ccos(ωot+θ) b) x(t) = 2+7cos(1/2t+θ1)+3cos(2/3t+θ2)+5cos(6t+θ3)
The bandwidth of a series resonant circuit is 400 Hz. (a) If the resonant frequency is 4000 Hz, find Q. (b) If R = 10?, what is the value of XL at resonance (c) Find the inductance L and capacitance C of the circuit.
FIGURE 4 shows an amplifier circuit. Write a short report on the operation and performance of the circuit. In completing the report you should: Explain the operation of the circuit and in particular the role of resistors R1 and R2.
A magnetic field of 2.0 T is applied to a bubble chamber to make the tracks of protons and other charged particles identifiable by the radius of the circles they move in. If a high-energy proton moves along an arc of a 3.3 cm circle
The following measurement were made on a two-port resistive circuit. With port 1 open, V2 =15V, V1 = 10 V, and I2 = 30 A. With port 1 short-circuited, V2 = 10 V, I2 =4 A, and I1 = -5 A. Find the parameters of the z-parameter two-port.
The voltage and current at the terminals of the circuit element are zero for t 0 they are v = 90-90e^(-1000t) V i = 50e^(-1000t) mA A) Find the maximum value of the power delivered to the circuit B)
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