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A core with three legs is shown in Figure. Its depth is 8 cm, and there are 400 turns on the center leg. The remaining dimensions are shown in the figure. The core is composed of a steel having the magnetization curve shown in Figure. Answer the following questions about this core:
(a) What current is required to produce a flux density of 0.5 T in the central leg of the core?
(b) What current is required to produce a flux density of 1.0 T in the central leg of the core? Is it twice the current in part (a)?
(c) What are the reluctances of the central and right legs of the core under the conditions in part (a)?
(d) What are the reluctances of the central and right legs of the core under the conditions in part (b)?
(e) What conclusion can you make about reluctances in real magnetic cores?
A chopper controlled electric train is powered from a 1500 VDE supply. The power semi- conductor switch element has a minimum effectice ON time of 40 Ms. during starting and slow speed running, the output of the chopper has to go as low as 15 V.
An amplifier represented with an input resistance of 10k ohm, an output resistance of 1k ohm, and the open circuit voltage gain of 1000 V/V is connected to a signal source of 10 mV peak amplitude with an internal resistance of 100k ohm.
a) if x(t) is even, show that its Fourier transform is real for all w (i.e: its imaginary part is identically 0) b)if x(t) is odd, show that its Fourier transform is imaginary for all w (i.e: its real part is identically 0)
1. for a 1-gbps network operating over 5000 km the delay is the limiting factor not the bandwidth. consider a
1. Explain the basic principles of classical conditioning using an experiment to illustrate how the principles are used. 2. In the operant conditioning school of behaviorism, what is partial reinforcement. Explain the four main kinds of partial rein..
You are given a black box, a 6 k Ohm resistor, a 40 nF capacitor, a voltmeter, and an ammeter. With these supplies you complete the following measurements at 950 Hz: You place the resistor and capacitor in series and measure a current flowing.
A 1.0000 V signal is converted to an 8-bit binary signal throughand ADC. The signal is then fed back into an 8-bit DAC. assummingthat both ADC and DAC range from 0 to 5.0 V, what would the outputvoltage of the DAC be
Suppose you toss coins three times. Let X be the event that first of the three coin tosses results in "heads." Let Y be the event that you observe total of 2 "heads." Are X and Y independent events
Use Modelsim and a VHDL test bench to simulate all the three models for a 4-to-1 multiplexer. Use basic gates for structural modeling. A tar VHDL library file is given for assistance.
An RLC circuit consists of a 25 mH inductor, a 0.001 µF capacitor and a variable resistor connected in series. The initial charge on the capacitor at t = 0 when the switch is closed is 1 mC. What is the critical resistance Rc for this circuit.
Two Random variables have a joint probability distribution function defined by F(x,y)=0 X 1y>1 A). Sketch this distribution function. B). Find the joint probability density function and sketch it.
A platinum resistance coil has a resistance at O0 C of 100 . Determine the change in resistance that will occur when the temperature rises to 30°C if the temperature coefficient of resistance is 0.0039 K-1.
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