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It is desired to run the motor in the previous problem with a power factor of unity. To achieve this, a capacitor C is connected in parallel across the motor, which results in a circuit like that shown in Fig. 2.13. Calculate the value of C to achieve this condition.
What do the letters PCM and PAM stand for? Why is PCM transmission preferred over PAM transmission? Give at least two reasons in your answer.
Briefly, the speed is adjusted unless the probability that the mean thickness lies within ±2% of the sample mean exceeds 0.99. A typical set of measurements (in mm) is as follows:
Write a function to compute the square root of a number based on Newton's method, but using a convergence criterion based on the difference between two successive iterates for the roots.
Derive the expression of the output resistance for circuits in Figure 1. Assume the BJT transistor is biased at forward-active region, and you can directly use the small signal parameters of the transistor, such as gm, β, rπ.
A first order allpass filter impulse is given by h(t)=-δ(t)+2e-tu(t) (a) Find the zero-state response of this filter for the input etu(t). (b) Sketch the input and the corresponding zero-state response.
Calculate the thermal-equilibrium electron and hole concentrations in a compensated p-type semiconductor. Consider a silicon semiconductor at T=300K in which Na = 10e16 cm-3 and Nd=3x1015 cm-3. Assume ni = 1.5 x1010 cm-3.
Also, fully define the mixer by giving two permissible frequencies for the local oscillator, and define the required band pass filter (center frequency and bandwidth).
(a) Determine free electron and hole concentration.(b) Calculate the effective density of states at valence band, Nv. Given that ni = 1x1010 cm3 and kT = 0.026.
120V, 60 Hz source is connected to a distribution line whose resistance, and inductive reactance is 0.001Ohm, j0.002 Ohm, respectively. Single phase, 100HP, 120V, 0.85 pf. motor; and 100Kw, 120V heater are connected in parallel.
Design a two-way radio link to operate over earth-Mars distances for data and picture transmission with a Mars probe at 2.5Ghz with a 5-MHz bandwidth. A power of10-19 W Hz-1 is to be delivered to the earth receiver and 10-17 WHz-1 to the Mars rece..
To analyze electric circuits, it is often necessary to solve simultaneous equations. To find the voltages Va, Vb, and Vc at nodes a, b, and c, the equations are 2(Va-Vb) + 5(Va-Vc) - e^(-t) =0 2(Vb-Vc) + 2Vb + 3(Vb-Vc) =0
1) Given the two beams (Aluminum and steel) (0.125"X 1"X 20"), with the following material properties: For Steel E = 206.8 (10^9) Pa and ρ = 0.7830 kg/cm. E= 30X10^6 psi, ρ =0.00074 lb/ft
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