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A designer has a supply of diodes for which current of 2mA flows at 0.7 V. Using a 1 mA current source, the designer wishes to create a reference voltage of 1.25 V. Suggest a combination of series and parallel diodes that will do the job as well as possible. How many diodes are needed? What voltage is actually achieved?
A 415V 50 Hz three phase supply has been divided into three balanced loads, as follows: LOAD 1 (STAR): 15 kVA at a power factor of 0.60 lagging; LOAD 2 (DELTA): 24 kW at a power factor of 0.55 lagging;
(a) If the excitation volatge Eo is equal to the terminal voltage ( 4kv ), what is the maximum real power which the motor can deliver without losing synchronism (b) What is the rotor pole shift in electrical degrees
A linear circuit has a capacitance of 1.0 mF and an inductor of 1.0 µH. If the frequency response of the voltage gain should stay the same and the capacitor is scaled to 70 µF, what should the value of the inductor be
A signal x(t) is sampled 4 times and the samples are {x[0], x[1], x[2], x[3]}. Its DFT harmonic function is {X[0], X[1], X[2], X[3]}. X[3] can be written as X[3] = a x[0] + b x[1] + c x[2] + d x[3]. What are the values of a,b,c and d
Discuss the steps required in calculating the collector-emitter voltage in a VDB circuit. Why does this circuit have a very stable Q point Discuss whether transistors being used as switching circuits should be biased in the active region.
A conductor 1 cm long is oriented parallel to the z axis a distance r = 25 cm from the origin and rotates at a speed of 1200 revolutions / minute. Find the voltage induced in the conductor if the driver rotates
The normalized lowpass filter with a cutoff frequency of 1 rad/sec is given as Hp(s) 1/s+1. Use Hp(s) and the BLT to obtain an corresponding IIR digital high passs filter with a cutoff of 30 Hz, assuming a sampling rate of 200 hz,
You mix aqueous solutions of sodium iodide and lead(II) acetate. If a reaction occurs, write the balanced molecular equation and the net ionic equation. If no reaction occurs, indicate this by writing the formulas of the compounds and an arrow fol..
For an ideal Zener, is the Zener voltage is 15v and the power rating is 750mW, what is the maximum zener current allowed What is the relationship between base current and collector current called
Determine the transmission coefficient for the system for X=a where a is on the order of nanometers. Determine the transmission coefficient for the system for X=a where a is on the order of meters
If the cutoff between "insecure" and "secure" were x amount of time, how long would a secure password have to be. State and justify your assumptions regarding the character set from which the password is selected and the amount of time required to..
Rectifying a sinusoidal provides a way to create a dc source. In this problem we consider the Fourier series of the full wave and half wave rectified signals. The half wave rectified signal xf(t) has a period T0 = 1 and its period from 0 to 1is: x..
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