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Referring to the solution to given example, determine the time when the current iL drops to 2 mA.
EXAMPLE
The inductor of given figure has an initial current level of 4 mA in the direction shown. (Specific methods to establish the initial current will be presented in the sections and problems to follow.)
a. Find the mathematical expression for the current through the coil once the switch is closed.
b. Find the mathematical expression for the voltage across the coil during the same transient period.
c. Sketch the waveform for each from initial value to final value.
Four frequencies are applied at the input of a non-linear amplifier. Write down all of the frequency components at the output of the non-linear device. Write down only the first three harmonics.
Consider the half wave rectifier with a 100Ω load and a peak voltage of 3.5 V. For a 1000μF capacitor, calculate the ripple amplitude if the frequency is 60 Hz.
A filamentary conductor is formed into an equilateral triangle with sides of length l carrying current I. Find the magnetic field intensity at the center of the triangle.
An increase in the reverse bias base -to-collector voltage reduces the bas width (base modulation effect). At what voltage would the base width be reduced to zero ("punch through" breakdown) if the zero-bias base width is 0.937 μm
In a scanning electron microscope, an electron is accelerated by a static electrode biased with a 12 kV voltage relative to the electron source. Upon bombarding the sample the electron “kick out†photons with specific wavelength.
a. Calculate the optimum refractive index of a single layer thin film antireflection coating for the silicon air interface at this wavelength. b. Calculate the optimum thickness of the layer.
Communication Channel A particularly interesting communication channel can be modeled as a linear, time-invariant system. When the transmitted signal x (t) is a pulse, the received signal r (t) is as shown (Figure 2.22).
Write a declaration for a two-dimensional array named temperature reads. (For simplicity, assume that a month has 30 days.) The rows of the array should represent days of the month; the columns should represent hours of the day.
Every 64 cycles, the circuit outputs the average ofthe past 64 input V values, then in the next cycle begins a new calculation (in other words, its behavior repeats). During the cycles when the circuit is not outputting the average, itshould outpu..
1. What is the force on a 10 cm wire carrying 1.0 A in a uniform magnetic field of 500 gauss 2. In the above example, if the current is in a loop of width 6.0 cm and the coil lies in the plane of magnetic flux, what is the torque on the loop
In RCL circuit connect with A.C. voltage, Inductor and capacitor increase thier voltage. For example Circuit connect with 230 V A.C. Voltage and frequency 4.96Hz. Inductor and capacitor's Vrms value become 1400V.
Give the zero-input or natural response yn(t), in terms of constants K, and K2. Give the general form of the forced response y phi (t), in terms of a constant beta. Find beta and give the exact forced response y phi (t).
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